📄 function.addslashes.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>Quote string with slashes</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.addcslashes.html">addcslashes</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.bin2hex.html">bin2hex</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.addslashes" class="refentry"> <div class="refnamediv"> <h1 class="refname">addslashes</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">addslashes</span> — <span class="dc-title">Quote string with slashes</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>addslashes</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$str</tt></span> )</div> <p class="para rdfs-comment"> Returns a string with backslashes before characters that need to be quoted in database queries etc. These characters are single quote (<i>'</i>), double quote (<i>"</i>), backslash (<i>\</i>) and NUL (the <b><tt>NULL</tt></b> byte). </p> <p class="para"> An example use of <b>addslashes()</b> is when you're entering data into a database. For example, to insert the name <i>O'reilly</i> into a database, you will need to escape it. Most databases do this with a <i>\</i> which would mean <i>O\'reilly</i>. This would only be to get the data into the database, the extra <i>\</i> will not be inserted. Having the PHP directive <a href="sybase.configuration.html#ini.magic-quotes-sybase" class="link"> magic_quotes_sybase</a> set to <i>on</i> will mean <i>'</i> is instead escaped with another <i>'</i>. </p> <p class="para"> The PHP directive <a href="info.configuration.html#ini.magic-quotes-gpc" class="link"> magic_quotes_gpc</a> is <i>on</i> by default, and it essentially runs <b>addslashes()</b> on all GET, POST, and COOKIE data. Do not use <b>addslashes()</b> on strings that have already been escaped with <a href="info.configuration.html#ini.magic-quotes-gpc" class="link">magic_quotes_gpc</a> as you'll then do double escaping. The function <a href="function.get-magic-quotes-gpc.html" class="function">get_magic_quotes_gpc()</a> may come in handy for checking this. </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 string to be escaped. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the escaped string. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 An <b>addslashes()</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">"Is your name O'reilly?"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Outputs: Is your name O\'reilly?<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">addslashes</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </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.stripcslashes.html" class="function" rel="rdfs-seeAlso">stripcslashes()</a></li> <li class="member"><a href="function.stripslashes.html" class="function" rel="rdfs-seeAlso">stripslashes()</a></li> <li class="member"><a href="function.addcslashes.html" class="function" rel="rdfs-seeAlso">addcslashes()</a></li> <li class="member"><a href="function.htmlspecialchars.html" class="function" rel="rdfs-seeAlso">htmlspecialchars()</a></li> <li class="member"><a href="function.quotemeta.html" class="function" rel="rdfs-seeAlso">quotemeta()</a></li> <li class="member"><a href="function.get-magic-quotes-gpc.html" class="function" rel="rdfs-seeAlso">get_magic_quotes_gpc()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.addcslashes.html">addcslashes</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.bin2hex.html">bin2hex</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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