function.htmlspecialchars-decode.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Convert special HTML entities back to characters</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.htmlentities.html">htmlentities</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.htmlspecialchars.html">htmlspecialchars</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.htmlspecialchars-decode" class="refentry"> <div class="refnamediv"> <h1 class="refname">htmlspecialchars_decode</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">htmlspecialchars_decode</span> — <span class="dc-title"> Convert special HTML entities back to characters </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>htmlspecialchars_decode</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$string</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$quote_style</tt></span> ] )</div> <p class="para rdfs-comment"> This function is the opposite of <a href="function.htmlspecialchars.html" class="function">htmlspecialchars()</a>. It converts special HTML entities back to characters. </p> <p class="para"> The converted entities are: <i>&amp;</i>, <i>&quot;</i> (when ENT_NOQUOTES is not set), <i>&#039;</i> (when ENT_QUOTES is set), <i>&lt;</i> and <i>&gt;</i>. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">string</tt></i></span> <dd> <p class="para"> The string to decode </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">quote_style</tt></i></span> <dd> <p class="para"> The quote style. One of the following constants: <table border="5"> <caption><b>quote_style constants</b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Constant Name</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>ENT_COMPAT</tt></b></td> <td colspan="1" rowspan="1" align="left">Will convert double-quotes and leave single-quotes alone (default)</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>ENT_QUOTES</tt></b></td> <td colspan="1" rowspan="1" align="left">Will convert both double and single quotes</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><b><tt>ENT_NOQUOTES</tt></b></td> <td colspan="1" rowspan="1" align="left">Will leave both double and single quotes unconverted</td> </tr> </tbody> </colgroup> </table> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the decoded string. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 A <b>htmlspecialchars_decode()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">'<p>this -&gt; &quot;</p>'</span><span style="color: #007700">;<br /><br />echo </span><span style="color: #0000BB">htmlspecialchars_decode</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// note that here the quotes aren't converted<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></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre><p>this -> "</p><p>this -> &quot;</p></pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.htmlspecialchars.html" class="function" rel="rdfs-seeAlso">htmlspecialchars()</a></li> <li class="member"><a href="function.html-entity-decode.html" class="function" rel="rdfs-seeAlso">html_entity_decode()</a></li> <li class="member"><a href="function.get-html-translation-table.html" class="function" rel="rdfs-seeAlso">get_html_translation_table()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.htmlentities.html">htmlentities</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.htmlspecialchars.html">htmlspecialchars</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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