html %escape

May 27, 2023 am 09:00 AM

HTML中,一些特殊字符有特殊的含义或者行为,比如<和>是用来标记HTML元素的起始和结束,如果不小心将这些字符放进HTML文档中,会导致文档无法正确的被渲染。因此,HTML提供了一些转义字符,以在HTML文档中使用这些特殊字符。

在HTML中,使用%来进行HTML字符的URL转义。下面是一些常用的HTML字符转义:

  1. < 转义小于符号

在HTML中,小于符号<是用于起始标签的,如果不进行转义,浏览器会误认为这是一个起始标签,导致文档无法正确显示。因此,使用<来代替<。

  1. > 转义大于符号

大于符号>同样也是起始标签的一个组成部分,使用>来代替。

  1. & 转义“&”符号

在HTML中,&符号是用于起始字符实体的,如果不进行转义,浏览器会认为后面的字符是一个新的字符实体。因此,使用&来代替&符号。

  1. " 转义双引号

双引号”通常用于HTML元素属性的值的引用,如果不进行转义,浏览器会认为属性值结束位置在双引号之前。因此,使用"来代替双引号。

  1. ' 转义单引号

单引号'也是用于HTML元素属性的值引用的一种可选字符,使用'来代替。

除了以上五种最常用的HTML字符转义外,还有一些其它的字符转义:

  1. ¢ 转义美分符号
  2. £ 转义英镑符号
  3. ¥ 转义日元符号
  4. € 转义欧元符号
  5. © 转义版权符号
  6. ® 转义注册符号

以上是一些重要的HTML字符转义,使用这些转义字符可以避免在HTML文档中不必要的错误。如果还有其它字符需要转义,可以在HTML特殊字符实体列表中查找。

代码演示:

<p>以下是HTML字符转义的演示:</p>
<ul>
    <li>&lt; 转义小于符号</li>
    <li>&gt; 转义大于符号</li>
    <li>&amp; 转义“&amp;”符号</li>
    <li>&quot; 转义双引号</li>
    <li>&apos; 转义单引号</li>
    <li>&cent; 转义美分符号</li>
    <li>&pound; 转义英镑符号</li>
    <li>&yen; 转义日元符号</li>
    <li>&euro; 转义欧元符号</li>
    <li>&copy; 转义版权符号</li>
    <li>&reg; 转义注册符号</li>
</ul>
Copy after login

输出结果:

以下是HTML字符转义的演示:

  • < 转义小于符号
  • > 转义大于符号
  • & 转义“&”符号
  • " 转义双引号
  • ' 转义单引号
  • ¢ 转义美分符号
  • £ 转义英镑符号
  • ¥ 转义日元符号
  • € 转义欧元符号
  • © 转义版权符号
  • ® 转义注册符号

总结:

HTML字符转义的作用在于保证文档的结构正确并且合法。在实际的编程过程中,我们需要时常考虑HTML字符转义以避免因字符串转义错误而导致的页面结构紊乱等问题。

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