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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>Compare two Unicode strings</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="collator.asort.html">Collator::asort</a></div> <div class="next" style="text-align: right; float: right;"><a href="collator.construct.html">Collator::__construct</a></div> <div class="up"><a href="class.collator.html">Collator</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="collator.compare" class="refentry"> <div class="refnamediv"> <h1 class="refname">Collator::compare</h1> <h1 class="refname">collator_compare</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">Collator::compare</span> -- <span class="refname">collator_compare</span> — <span class="dc-title">Compare two Unicode strings</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <p class="para"> Object oriented style </p> <div class="methodsynopsis dc-description"> <span class="type">integer</span> <span class="methodname"><b><b>Collator::compare</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"> Procedural style </p> <div class="methodsynopsis dc-description"> <span class="type">integer</span> <span class="methodname"><b><b>collator_compare</b></b></span> ( <span class="methodparam"><span class="type"><a href="class.collator.html" class="type Collator">Collator</a></span> <tt class="parameter">$coll</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$str1</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$str2</tt></span> )</div> <p class="para rdfs-comment"> Compare two Unicode strings according to collation rules. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">coll</tt></i></span> <dd> <p class="para"> <a href="class.collator.html" class="classname">Collator</a> object. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">str1</tt></i></span> <dd> <p class="para"> The first string to compare. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">str2</tt></i></span> <dd> <p class="para"> The second string to compare. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para">Return comparison result:</p> <p class="para"> <ul class="itemizedlist"> <li class="listitem"> <p class="para"> 1 if <em class="emphasis"> str1</em> is <em class="emphasis"> greater</em> than <em class="emphasis"> str2</em> ; </p> </li> <li class="listitem"> <p class="para"> 0 if <em class="emphasis">str1</em> is <em class="emphasis">equal</em> to <em class="emphasis"> str2</em>; </p> </li> <li class="listitem"> <p class="para"> -1 if <em class="emphasis"> str1</em> is <em class="emphasis"> less</em> than <em class="emphasis"> str2</em> . </p> </li> </ul> On error <a href="language.types.boolean.html" class="type boolean">boolean</a> <b><tt>FALSE</tt></b> is returned. </p> <div class="warning"><b class="warning">Warning</b><p class="simpara">This function mayreturn Boolean <b><tt>FALSE</tt></b>, but may also return a non-Boolean value whichevaluates to <b><tt>FALSE</tt></b>, such as <i>0</i> or"". Please read the section on <a href="language.types.boolean.html" class="link">Booleans</a> for moreinformation. Use <a href="language.operators.comparison.html" class="link">the ===operator</a> for testing the return value of thisfunction.</p></div> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>collator_compare()</b>example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$s1 </span><span style="color: #007700">= </span><span style="color: #DD0000">'Hello'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$s2 </span><span style="color: #007700">= </span><span style="color: #DD0000">'hello'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$coll </span><span style="color: #007700">= </span><span style="color: #0000BB">collator_create</span><span style="color: #007700">( </span><span style="color: #DD0000">'en_US' </span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">collator_compare</span><span style="color: #007700">( </span><span style="color: #0000BB">$coll</span><span style="color: #007700">, </span><span style="color: #0000BB">$s1</span><span style="color: #007700">, </span><span style="color: #0000BB">$s2 </span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$res </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #0000BB">collator_get_error_message</span><span style="color: #007700">( </span><span style="color: #0000BB">$coll </span><span style="color: #007700">);<br />} else if( </span><span style="color: #0000BB">$res </span><span style="color: #007700">> </span><span style="color: #0000BB">0 </span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"s1 is greater than s2\n"</span><span style="color: #007700">;<br />} else if( </span><span style="color: #0000BB">$res </span><span style="color: #007700">< </span><span style="color: #0000BB">0 </span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"s1 is less than s2\n"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"s1 is equal to s2\n"</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> s1 is greater than s2 </pre></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="collator.sort.html" class="function" rel="rdfs-seeAlso">collator_sort()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="collator.asort.html">Collator::asort</a></div> <div class="next" style="text-align: right; float: right;"><a href="collator.construct.html">Collator::__construct</a></div> <div class="up"><a href="class.collator.html">Collator</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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