RSS中的CDATA区块有什么用？（区块.什么用.RSS.CDATA...）

&amp;amp;amp;amp;amp;amp;lt;blockquote>答案：CDATA区块用于避免XML解析器将RSS内容中的特殊字符或HTML代码误解析为XML标签，通过将其包裹在<![CDATA[...]]>中，确保内容被当作纯文本处理，从而保证RSS文件的正确性和完整性。&amp;amp;amp;amp;amp;amp;lt;/blockquote> &amp;amp;amp;amp;amp;amp;lt;p>&amp;amp;amp;amp;amp;amp;lt;img src=&amp;amp;amp;quot;https://img.php.cn/upload/article/001/221/864/175704288994565.jpg&amp;amp;amp;quot; alt=&amp;amp;amp;quot;rss中的cdata区块有什么用？&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>RSS中的CDATA区块，简单来说，就是告诉XML解析器：“嘿，这部分内容你别管它是不是XML标签，别解析，就把它当成纯粹的字符数据来处理。”这在我们需要在XML文档（比如RSS的&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>description&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>字段）里包含一些本身看起来像XML，但我们又不希望它被解析为XML结构的内容时，简直是救星。最常见的场景就是嵌入HTML代码。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>CDATA区块的存在，主要是为了解决XML文档中嵌入特殊字符或结构化文本时的解析冲突问题。XML的解析器对&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>等符号非常敏感，它们被视为XML标记的开始或实体引用。如果你在RSS的&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>description&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>标签里直接放一段包含HTML的文本，比如&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><b>Hello</b>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，解析器会误以为&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><b>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>是一个新的XML标签，而不是你想要展示的粗体文本，这就会导致整个RSS文件结构出错，或者内容被错误地截断、解析。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>和&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>这两个标记，就像给里面的内容加了一层“保护罩”。在这两个标记之间的一切，无论它长得多像XML，解析器都会视而不见，直接将其作为一个整体的字符串处理。这使得内容发布者可以轻松地在RSS feed中包含完整的HTML片段、JavaScript代码（虽然RSS里通常不鼓励JS），甚至是其他XML片段，而无需手动将每个&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>替换成&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，将&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>替换成&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，大大简化了内容生成的复杂性，也保证了内容的完整性和正确性。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;h3> &amp;amp;amp;amp;amp;amp;lt;a style=&amp;amp;amp;quot;color:#f60; text-decoration:underline;&amp;amp;amp;quot; title=&amp;amp;amp;quot;为什么&amp;amp;amp;quot; href=&amp;amp;amp;quot;https://www.php.cn/zt/92702.html&amp;amp;amp;quot; target=&amp;amp;amp;quot;_blank&amp;amp;amp;quot;>为什么&amp;amp;amp;amp;amp;amp;lt;/a>RSS内容需要CDATA区块？&amp;amp;amp;amp;amp;amp;lt;/h3> &amp;amp;amp;amp;amp;amp;lt;p>我们做内容发布的，尤其是那些需要通过RSS订阅源来分发文章摘要或者完整内容的，经常会遇到一个头疼的问题：如何在XML格式的RSS里，准确无误地呈现带有格式的文本，比如加粗、斜体、链接，甚至是图片。XML本身对结构要求非常严格，任何一个不符合规范的符号，都可能导致整个XML文件解析失败。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>想象一下，你的文章摘要里有一段HTML代码，比如&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><p>这是一段包含<b>重要信息</b>的文本。</p>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>。如果你直接把它塞进RSS的&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><description>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>标签里，XML解析器一看到&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><p>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>和&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><b>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，就会以为它们是新的XML标签，而不是你内容的一部分。结果就是，RSS阅读器可能无法正确显示你的内容，甚至会报错，导致你的订阅者看不到更新。这简直是内容分发者的噩梦。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>CDATA区块就是来解决这个问题的。它提供了一种机制，允许你在XML文档中嵌入任何文本数据，而不用担心这些数据中的特殊字符（如&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>'&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;quot;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>）会被XML解析器误解为XML标记或实体引用。通过使用CDATA，你可以直接把原始的HTML代码放进去，就像这样：&amp;amp;amp;amp;amp;amp;lt;/p>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class='brush:xml;toolbar:false;'><item> <title>我的最新文章</title> <link>http://example.com/article1</link> <description><![CDATA[ <p>大家好，这是我的<b>最新文章</b>！</p> <p>点击<a href=&amp;amp;amp;quot;http://example.com/readmore&amp;amp;amp;quot;>这里</a>阅读更多。</p> ]]></description> <pubDate>Mon, 01 Jan 2023 12:00:00 GMT</pubDate> </item>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;p>这样一来，RSS阅读器在解析这个feed时，会把&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[...]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>之间的所有内容都当作纯文本字符串来处理，然后由阅读器负责渲染这段HTML，从而正确展示出带有格式的文章摘要。这不仅简化了内容生成时的编码工作，也确保了内容在不同平台上的兼容性和准确性。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;h3>CDATA区块如何避免XML解析错误？&amp;amp;amp;amp;amp;amp;lt;/h3> &amp;amp;amp;amp;amp;amp;lt;p>CDATA区块的核心机制在于它改变了XML解析器处理特定文本区域的方式。在标准的XML解析中，解析器会逐字扫描文档，并根据预定义的规则识别标签、属性、实体引用等。例如，当它看到一个&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>符号时，它会期望后面跟着一个实体名称（如&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>lt;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>），如果不是，就可能报告错误。同样，&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>符号总是被视为一个新标签的开始。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>然而，当解析器遇到&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>序列时，它会立即进入一种特殊模式。在这种模式下，直到它遇到&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>序列之前，它会将其间的所有字符都视为纯粹的字符数据，不再进行任何XML解析规则的检查。这意味着，即使内容中包含了&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>等在普通XML文本中具有特殊含义的字符，解析器也不会尝试将它们解释为标签或实体，而是直接将它们作为字面量字符存储起来。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>举个例子，假设你想在RSS的描述中包含一段带有JavaScript代码的文本，比如：&amp;amp;amp;amp;amp;amp;lt;/p>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class='brush:html;toolbar:false;'><script>alert(&amp;amp;amp;quot;Hello <World> &amp;amp;amp;amp;amp;amp;amp; Goodbye&amp;amp;amp;quot;);</script>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;p>如果直接放在普通XML文本中，你需要进行大量的转义：&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;aritcle_card&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;a class=&amp;amp;amp;quot;aritcle_card_img&amp;amp;amp;quot; href=&amp;amp;amp;quot;/ai/pia&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;img src=&amp;amp;amp;quot;https://img.php.cn/upload/ai_manual/000/000/000/175680367646107.png&amp;amp;amp;quot; alt=&amp;amp;amp;quot;PIA&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;/a> &amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;aritcle_card_info&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;a href=&amp;amp;amp;quot;/ai/pia&amp;amp;amp;quot;>PIA&amp;amp;amp;amp;amp;amp;lt;/a> &amp;amp;amp;amp;amp;amp;lt;p>全面的AI聚合平台，一站式访问所有顶级AI模型&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;img src=&amp;amp;amp;quot;/static/images/card_xiazai.png&amp;amp;amp;quot; alt=&amp;amp;amp;quot;PIA&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;span>226&amp;amp;amp;amp;amp;amp;lt;/span> &amp;amp;amp;amp;amp;amp;lt;/div> &amp;amp;amp;amp;amp;amp;lt;/div> &amp;amp;amp;amp;amp;amp;lt;a href=&amp;amp;amp;quot;/ai/pia&amp;amp;amp;quot; class=&amp;amp;amp;quot;aritcle_card_btn&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;span>查看详情&amp;amp;amp;amp;amp;amp;lt;/span> &amp;amp;amp;amp;amp;amp;lt;img src=&amp;amp;amp;quot;/static/images/cardxiayige-3.png&amp;amp;amp;quot; alt=&amp;amp;amp;quot;PIA&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;/a> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class='brush:xml;toolbar:false;'><description> &amp;amp;amp;amp;amp;amp;lt;script>alert(&amp;amp;amp;quot;Hello &amp;amp;amp;amp;amp;amp;lt;World> &amp;amp;amp;amp;amp;amp;amp; Goodbye&amp;amp;amp;quot;);&amp;amp;amp;amp;amp;amp;lt;/script> </description>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;p>这不仅写起来麻烦，读起来也相当费劲，而且一旦漏掉一个转义符，整个XML文档就可能失效。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>有了CDATA区块，你可以这样写：&amp;amp;amp;amp;amp;amp;lt;/p>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class='brush:xml;toolbar:false;'><description><![CDATA[ <script>alert(&amp;amp;amp;quot;Hello <World> &amp;amp;amp;amp;amp;amp;amp; Goodbye&amp;amp;amp;quot;);</script> ]]></description>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;p>在这种情况下，XML解析器会把&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>到&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>之间的所有内容，包括&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><script>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>标签和里面的特殊字符，都当作一个单一的字符串来处理。它不会去解析&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><script>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>为一个XML标签，也不会解析&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>为一个实体引用。这样就有效地绕过了XML的严格解析规则，避免了因内容中包含XML特殊字符而导致的解析错误，确保了原始内容的完整性和准确传输。这对于那些需要嵌入大量非XML格式，但又可能包含XML特殊字符的文本内容来说，是不可或缺的。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;h3>使用CDATA区块有哪些潜在的注意事项或最佳实践？&amp;amp;amp;amp;amp;amp;lt;/h3> &amp;amp;amp;amp;amp;amp;lt;p>虽然CDATA区块在处理XML特殊字符方面非常方便，但它并非万能，使用时还是有些细节需要注意，否则可能会引入新的问题或者让内容处理变得复杂。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>首先，一个很重要的限制是&amp;amp;amp;amp;amp;amp;lt;strong>CDATA区块不能嵌套&amp;amp;amp;amp;amp;amp;lt;/strong>。也就是说，你不能在一个&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[...]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>内部再包含另一个&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[...]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>。如果你的内容本身就包含了&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>这个序列，那就会导致CDATA区块提前结束，从而破坏你的XML结构。遇到这种情况，你需要手动对内容中的&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>进行处理。一个常见的做法是将其拆分为&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>和&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，或者用实体引用&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]&gt;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>来代替，虽然这听起来有点反直觉，但确实是解决这个特定冲突的方法。比如，如果内容是&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>Foo bar ]]> Baz&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，你可能需要写成&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;><![CDATA[Foo bar ]]>]]&gt;<![CDATA[ Baz]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>，这确实有点丑陋，所以尽量避免内容中出现&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>]]>&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>其次，&amp;amp;amp;amp;amp;amp;lt;strong>CDATA区块并不提供任何安全防护&amp;amp;amp;amp;amp;amp;lt;/strong>。它仅仅是告诉XML解析器不要解析内部的字符，把它们当成纯文本。但如果你的CDATA区块里包含恶意HTML（比如XSS攻击代码），那么当RSS阅读器或者其他客户端渲染这段内容时，这些恶意代码依然会被执行。所以，作为内容发布者，你在将用户生成的内容放入CDATA区块之前，仍然需要进行严格的&amp;amp;amp;amp;amp;amp;lt;strong>内容净化（sanitization）&amp;amp;amp;amp;amp;amp;lt;/strong>，过滤掉潜在的危险标签和属性。这和在网页上显示用户输入是同样的道理，绝不能因为用了CDATA就放松警惕。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>再来，&amp;amp;amp;amp;amp;amp;lt;strong>不要过度使用CDATA&amp;amp;amp;amp;amp;amp;lt;/strong>。如果你的文本内容本身不包含任何XML特殊字符，或者只需要少量转义，那么直接使用XML实体引用（如&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>、&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;code&amp;amp;amp;quot; style=&amp;amp;amp;quot;position:relative; padding:0px; margin:0px;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;lt;pre class=&amp;amp;amp;quot;brush:php;toolbar:false;&amp;amp;amp;quot;>&amp;amp;amp;amp;amp;amp;amp;&amp;amp;amp;amp;amp;amp;lt;/pre>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;div class=&amp;amp;amp;quot;contentsignin&amp;amp;amp;quot;> &amp;amp;amp;amp;amp;amp;lt;/div>&amp;amp;amp;amp;amp;amp;lt;/div>）可能更清晰。CDATA区块虽然方便，但会使得原始XML文件看起来更臃肿，尤其是在调试时，一大段的HTML代码被包裹在CDATA里，不如看到转义后的实体来得直观。只在确实需要嵌入大量结构化文本，且其中包含大量XML特殊字符时才考虑使用。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>最后，要留意&amp;amp;amp;amp;amp;amp;lt;strong>字符编码&amp;amp;amp;amp;amp;amp;lt;/strong>。CDATA区块内的内容仍然受整个XML文档声明的字符编码影响。如果你的XML文档声明是UTF-8，那么CDATA区块内的文本也应该按照UTF-8编码。如果编码不一致，可能会导致乱码问题。虽然这通常不是CDATA特有的问题，但在处理&amp;amp;amp;amp;amp;amp;lt;a style=&amp;amp;amp;quot;color:#f60; text-decoration:underline;&amp;amp;amp;quot; title=&amp;amp;amp;quot;多语言&amp;amp;amp;quot; href=&amp;amp;amp;quot;https://www.php.cn/zt/20151.html&amp;amp;amp;quot; target=&amp;amp;amp;quot;_blank&amp;amp;amp;quot;>多语言&amp;amp;amp;amp;amp;amp;lt;/a>内容时，这一点尤其需要注意。&amp;amp;amp;amp;amp;amp;lt;/p> &amp;amp;amp;amp;amp;amp;lt;p>总而言之，CDATA区块是一个强大的&amp;amp;amp;amp;amp;amp;lt;a style=&amp;amp;amp;quot;color:#f60; text-decoration:underline;&amp;amp;amp;quot; title=&amp;amp;amp;quot;工具&amp;amp;amp;quot; href=&amp;amp;amp;quot;https://www.php.cn/zt/16887.html&amp;amp;amp;quot; target=&amp;amp;amp;quot;_blank&amp;amp;amp;quot;>工具&amp;amp;amp;amp;amp;amp;lt;/a>，它在解决XML和嵌入内容之间的冲突方面非常有效。但理解其局限性，并结合安全实践来使用它，才能真正发挥其价值，而不是引入新的麻烦。&amp;amp;amp;amp;amp;amp;lt;/p>

以上就是RSS中的CDATA区块有什么用？的详细内容，更多请关注知识资源分享宝库其它相关文章！

相关标签： javascript java html js go 工具 多语言 为什么 JavaScript html xss xml 字符串 JS 大家都在看： RSS如何实现自动化发布？ RSS如何支持播客？ RSS如何支持多语言？ RSS如何导出为PDF？ RSS扩展元素有哪些？