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204 lines
7.0 KiB
HTML
204 lines
7.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>将特殊的 HTML 实体转换回普通字符</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.htmlspecialchars-decode" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">htmlspecialchars_decode</h1>
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<p class="verinfo">(PHP 5 >= 5.1.0, PHP 7)</p><p class="refpurpose"><span class="refname">htmlspecialchars_decode</span> — <span class="dc-title">
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将特殊的 HTML 实体转换回普通字符
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.htmlspecialchars-decode-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>htmlspecialchars_decode</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = ENT_COMPAT | ENT_HTML401</span></span>
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] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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此函数的作用和 <span class="function"><a href="htmlspecialchars.html" class="function">htmlspecialchars()</a></span> 刚好相反。它将特殊的HTML实体转换回普通字符。
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</p>
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<p class="para">
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被转换的实体有： <em>&amp;</em>，
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<em>&quot;</em> （没有设置<strong><code>ENT_NOQUOTES</code></strong> 时）,
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<em>&#039;</em> （设置了 <strong><code>ENT_QUOTES</code></strong> 时），
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<em>&lt;</em> 以及<em>&gt;</em>。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.htmlspecialchars-decode-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">string</code></dt>
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<dd>
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<p class="para">
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要解码的字符串
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</p>
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</dd>
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<dt>
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<code class="parameter">flags</code></dt>
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<dd>
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<p class="para">
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用下列标记中的一个或多个作为一个位掩码，来指定如何处理引号和使用哪种文档类型。默认为 <em>ENT_COMPAT | ENT_HTML401</em>。
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<table class="doctable table">
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<caption><strong>有效的 <code class="parameter">flags</code> 常量</strong></caption>
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<thead>
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<tr>
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<th>常量名</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td><strong><code>ENT_COMPAT</code></strong></td>
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<td>转换双引号，不转换单引号。</td>
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</tr>
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<tr>
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<td><strong><code>ENT_QUOTES</code></strong></td>
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<td>单引号和双引号都转换。</td>
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</tr>
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<tr>
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<td><strong><code>ENT_NOQUOTES</code></strong></td>
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<td>单引号和双引号都不转换。</td>
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</tr>
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<tr>
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<td><strong><code>ENT_HTML401</code></strong></td>
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<td>
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作为HTML 4.01编码处理。
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</td>
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</tr>
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<tr>
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<td><strong><code>ENT_XML1</code></strong></td>
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<td>
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作为XML 1编码处理。
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</td>
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</tr>
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<tr>
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<td><strong><code>ENT_XHTML</code></strong></td>
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<td>
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作为XHTML编码处理。
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</td>
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</tr>
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<tr>
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<td><strong><code>ENT_HTML5</code></strong></td>
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<td>
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作为HTML 5编码处理。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.htmlspecialchars-decode-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回解码后的字符串。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.htmlspecialchars-decode-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.4.0</td>
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<td>
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增加了 <strong><code>ENT_HTML401</code></strong>、<strong><code>ENT_XML1</code></strong>、
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<strong><code>ENT_XHTML</code></strong> 和 <strong><code>ENT_HTML5</code></strong> 等常量。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.htmlspecialchars-decode-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-5913">
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<p><strong>Example #1 一个 <span class="function"><strong>htmlspecialchars_decode()</strong></span> 的例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"<p>this -&gt; &quot;</p>\n"</span><span style="color: #007700">;<br /><br />echo </span><span style="color: #0000BB">htmlspecialchars_decode</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 注意，这里的引号不会被转换<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">htmlspecialchars_decode</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">ENT_NOQUOTES</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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<p>this -> "</p>
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<p>this -> &quot;</p>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.htmlspecialchars-decode-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="htmlspecialchars.html" class="function" rel="rdfs-seeAlso">htmlspecialchars()</a> - 将特殊字符转换为 HTML 实体</span></li>
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<li class="member"><span class="function"><a href="html_entity_decode.html" class="function" rel="rdfs-seeAlso">html_entity_decode()</a> - Convert HTML entities to their corresponding characters</span></li>
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<li class="member"><span class="function"><a href="get_html_translation_table.html" class="function" rel="rdfs-seeAlso">get_html_translation_table()</a> - 返回使用 htmlspecialchars 和 htmlentities 后的转换表</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |