📄 function.strip-tags.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>Strip HTML and PHP tags from a string</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.strcspn.html">strcspn</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.stripcslashes.html">stripcslashes</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.strip-tags" class="refentry"> <div class="refnamediv"> <h1 class="refname">strip_tags</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">strip_tags</span> — <span class="dc-title">Strip HTML and PHP tags from a string</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>strip_tags</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$str</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$allowable_tags</tt></span> ] )</div> <p class="para rdfs-comment"> This function tries to return a string with all HTML and PHP tags stripped from a given <i><tt class="parameter">str</tt></i>. It uses the same tag stripping state machine as the <a href="function.fgetss.html" class="function">fgetss()</a> function. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">str</tt></i></span> <dd> <p class="para"> The input string. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">allowable_tags</tt></i></span> <dd> <p class="para"> You can use the optional second parameter to specify tags which should not be stripped. </p> <blockquote><p><b class="note">Note</b>: HTML comments and PHP tags are also stripped. This is hardcoded and can not be changed with <i><tt class="parameter">allowable_tags</tt></i>. <br /> </p></blockquote> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the stripped string. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.0.0</td> <td colspan="1" rowspan="1" align="left"> <b>strip_tags()</b> is now binary safe </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.3.0</td> <td colspan="1" rowspan="1" align="left"> HTML comments are now always stripped </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.0.0</td> <td colspan="1" rowspan="1" align="left"> The <i><tt class="parameter">allowable_tags</tt></i> parameter was added </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>strip_tags()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$text </span><span style="color: #007700">= </span><span style="color: #DD0000">'<p>Test paragraph.</p><!-- Comment --> <a href="#fragment">Other text</a>'</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">strip_tags</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Allow <p> and <a><br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">strip_tags</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">, </span><span style="color: #DD0000">'<p><a>'</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>Test paragraph. Other text<p>Test paragraph.</p> <a href="#fragment">Other text</a></pre></div> </pre></div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <div class="warning"><b class="warning">Warning</b> <p class="para"> Because <b>strip_tags()</b> does not actually validate the HTML, partial, or broken tags can result in the removal of more text/data than expected. </p> </div> <div class="warning"><b class="warning">Warning</b> <p class="para"> This function does not modify any attributes on the tags that you allow using <i><tt class="parameter">allowable_tags</tt></i>, including the <i>style</i> and <i>onmouseover</i> attributes that a mischievous user may abuse when posting text that will be shown to other users. </p> </div> </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> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.strcspn.html">strcspn</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.stripcslashes.html">stripcslashes</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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