<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Binary safe case-insensitive string comparison</title> </head> <body><div class="manualnavbar" 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" id="refsect1-function.strcasecmp-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><strong>strcasecmp</strong></span> ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str1</code></span> , <span class="methodparam"><span class="type">string</span> <code class="parameter">$str2</code></span> )</div> <p class="para rdfs-comment"> Binary safe case-insensitive string comparison. </p> </div> <div class="refsect1 parameters" id="refsect1-function.strcasecmp-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">str1</code></em></span> <dd> <p class="para"> The first string </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">str2</code></em></span> <dd> <p class="para"> The second string </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.strcasecmp-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns < 0 if <em><code class="parameter">str1</code></em> is less than <em><code class="parameter">str2</code></em>; > 0 if <em><code class="parameter">str1</code></em> is greater than <em><code class="parameter">str2</code></em>, and 0 if they are equal. </p> </div> <div class="refsect1 examples" id="refsect1-function.strcasecmp-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-4884"> <p><strong>Example #1 <span class="function"><strong>strcasecmp()</strong></span> example</strong></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" id="refsect1-function.strcasecmp-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.strcmp.html" class="function" rel="rdfs-seeAlso">strcmp()</a> - Binary safe string comparison</span></li> <li class="member"> <span class="function"><a href="function.preg-match.html" class="function" rel="rdfs-seeAlso">preg_match()</a> - Perform a regular expression match</span></li> <li class="member"> <span class="function"><a href="function.substr-compare.html" class="function" rel="rdfs-seeAlso">substr_compare()</a> - Binary safe comparison of two strings from an offset, up to length characters</span></li> <li class="member"> <span class="function"><a href="function.strncasecmp.html" class="function" rel="rdfs-seeAlso">strncasecmp()</a> - Binary safe case-insensitive string comparison of the first n characters</span></li> <li class="member"> <span class="function"><a href="function.stristr.html" class="function" rel="rdfs-seeAlso">stristr()</a> - Case-insensitive strstr</span></li> <li class="member"> <span class="function"><a href="function.substr.html" class="function" rel="rdfs-seeAlso">substr()</a> - Return part of a string</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; 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