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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>Binary safe case-insensitive string comparison</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.str-word-count.html">str_word_count</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.strchr.html">strchr</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.strcasecmp" class="refentry"> <div class="refnamediv"> <h1 class="refname">strcasecmp</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">strcasecmp</span> — <span class="dc-title">Binary safe case-insensitive string comparison</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>strcasecmp</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$str1</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$str2</tt></span> )</div> <p class="para rdfs-comment"> Binary safe case-insensitive string comparison. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">str1</tt></i></span> <dd> <p class="para"> The first string </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">str2</tt></i></span> <dd> <p class="para"> The second string </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns < 0 if <i><tt class="parameter">str1</tt></i> is less than <i><tt class="parameter">str2</tt></i>; > 0 if <i><tt class="parameter">str1</tt></i> is greater than <i><tt class="parameter">str2</tt></i>, and 0 if they are equal. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>strcasecmp()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$var1 </span><span style="color: #007700">= </span><span style="color: #DD0000">"Hello"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$var2 </span><span style="color: #007700">= </span><span style="color: #DD0000">"hello"</span><span style="color: #007700">;<br />if (</span><span style="color: #0000BB">strcasecmp</span><span style="color: #007700">(</span><span style="color: #0000BB">$var1</span><span style="color: #007700">, </span><span style="color: #0000BB">$var2</span><span style="color: #007700">) == </span><span style="color: #0000BB">0</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'$var1 is equal to $var2 in a case-insensitive string comparison'</span><span style="color: #007700">;<br />}<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.preg-match.html" class="function" rel="rdfs-seeAlso">preg_match()</a></li> <li class="member"><a href="function.strcmp.html" class="function" rel="rdfs-seeAlso">strcmp()</a></li> <li class="member"><a href="function.substr.html" class="function" rel="rdfs-seeAlso">substr()</a></li> <li class="member"><a href="function.stristr.html" class="function" rel="rdfs-seeAlso">stristr()</a></li> <li class="member"><a href="function.strncasecmp.html" class="function" rel="rdfs-seeAlso">strncasecmp()</a></li> <li class="member"><a href="function.strstr.html" class="function" rel="rdfs-seeAlso">strstr()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.str-word-count.html">str_word_count</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.strchr.html">strchr</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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