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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>Get string value of a variable</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.settype.html">settype</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.unserialize.html">unserialize</a></div> <div class="up"><a href="ref.var.html">Variable handling Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.strval" class="refentry"> <div class="refnamediv"> <h1 class="refname">strval</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">strval</span> — <span class="dc-title">Get string value of a variable</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>strval</b></b></span> ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$var</tt></span> )</div> <p class="simpara"> Get the string value of a variable. See the documentation on <a href="language.types.string.html" class="type string">string</a> for more information on converting to string. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">var</tt></i></span> <dd> <p class="para"> The variable that is being converted to a <a href="language.types.string.html" class="type string">string</a>. </p> <p class="para"> <i><tt class="parameter">var</tt></i> may be any scalar type. You cannot use <b>strval()</b> on arrays or objects. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The <a href="language.types.string.html" class="type string">string</a> value of <i><tt class="parameter">var</tt></i>. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>strval()</b> example using PHP5's magic __toString method</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">class </span><span style="color: #0000BB">StrValTest<br /></span><span style="color: #007700">{<br /> public function </span><span style="color: #0000BB">__toString</span><span style="color: #007700">()<br /> {<br /> return </span><span style="color: #0000BB">__CLASS__</span><span style="color: #007700">;<br /> }<br />}<br /><br /></span><span style="color: #FF8000">// Prints 'StrValTest'<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">strval</span><span style="color: #007700">(new </span><span style="color: #0000BB">StrValTest</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.floatval.html" class="function" rel="rdfs-seeAlso">floatval()</a></li> <li class="member"><a href="function.intval.html" class="function" rel="rdfs-seeAlso">intval()</a></li> <li class="member"><a href="function.settype.html" class="function" rel="rdfs-seeAlso">settype()</a></li> <li class="member"><a href="language.types.type-juggling.html" class="link">Type juggling</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.settype.html">settype</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.unserialize.html">unserialize</a></div> <div class="up"><a href="ref.var.html">Variable handling 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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