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PHP html_entity_decode() 函数

匿名 · 更新于 2013/12/12

PHP html_entity_decode() 函数

定义和用法

html_entity_decode() 函数把 HTML 实体转换为字符。

html_entity_decode() 是 htmlentities() 的反函数。

语法

html_entity_decode(string,quotestyle,character-set)
参数 描述
string 必需。规定要解码的字符串。
quotestyle

可选。规定如何解码单引号和双引号。

		<ul class="listintable" style="margin: 20px; padding-right: 0px; padding-left: 0px; border: 0px; list-style-type: none;">
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">ENT_COMPAT - 默认。仅解码双引号。</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">ENT_QUOTES - 解码双引号和单引号。</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">ENT_NOQUOTES - 不解码任何引号。</li>
		</ul>
		</td>
	</tr>
	<tr style="margin: 0px; padding: 0px; border: 0px; ">
		<td style="margin: 0px; padding: 5px 15px 5px 5px; border: 1px solid rgb(170, 170, 170); vertical-align: text-top; background-color: rgb(239, 239, 239); ">character-set</td>
		<td style="margin: 0px; padding: 5px 15px 5px 5px; border: 1px solid rgb(170, 170, 170); vertical-align: text-top; background-color: rgb(239, 239, 239); ">
		<p style="margin: 0px; padding: 0px; border: 0px; line-height: 18px; ">可选。字符串值，规定要使用的字符集。</p>

		<ul class="listintable" style="margin: 20px; padding-right: 0px; padding-left: 0px; border: 0px; list-style-type: none;">
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">ISO-8859-1 - 默认。西欧。</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">ISO-8859-15 - 西欧（增加 Euro 符号以及法语、芬兰语字母）。</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">UTF-8 - ASCII 兼容多字节 8 比特 Unicode</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">cp866 - DOS 专用 Cyrillic 字符集</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">cp1251 - Windows 专用 Cyrillic 字符集</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">cp1252 - Windows 专用西欧字符集</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">KOI8-R - 俄语</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">GB2312 - 简体中文，国家标准字符集</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">BIG5 - 繁体中文</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">BIG5-HKSCS - Big5 香港扩展</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">Shift_JIS - 日语</li>
			<li style="margin: 0px; padding: 0px; border: 0px; list-style-type: disc; ">EUC-JP - 日语</li>
		</ul>
		</td>
	</tr>
</tbody>

提示和注释

提示：无法被识别的字符集将被忽略，并由 ISO-8859-1 代替。

例子

<?php
$str = "John &amp; &#039;Adams&#039;";
echo html_entity_decode($str);
echo "<br />";
echo html_entity_decode($str, ENT_QUOTES);
echo "<br />";
echo html_entity_decode($str, ENT_NOQUOTES);
?>

浏览器输出：

John & 'Adams'
John & 'Adams'
John & 'Adams'

如果在浏览器中查看源代码，会看到这些 HTML：

<html>
<body>
John & &#039;Adams&#039;<br />
John & 'Adams'<br />
John & &#039;Adams&#039;
</body>
</html>