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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>Sort an array and maintain index association</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.arsort.html">arsort</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.compact.html">compact</a></div> <div class="up"><a href="ref.array.html">Array Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.asort" class="refentry"> <div class="refnamediv">  <h1 class="refname">asort</h1>  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">asort</span> &mdash; <span class="dc-title">Sort an array and maintain index association</span></p> </div> <div class="refsect1 description">  <h3 class="title">Description</h3>  <div class="methodsynopsis dc-description">   <span class="type">bool</span> <span class="methodname"><b><b>asort</b></b></span>    ( <span class="methodparam"><span class="type">array</span> <tt class="parameter reference">&$array</tt></span>   [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$sort_flags</tt></span>  ] )</div>  <p class="para rdfs-comment">   This function sorts an array such that array indices maintain   their correlation with the array elements they are associated   with.  This is used mainly when sorting associative arrays where   the actual element order is significant.  </p> </div> <div class="refsect1 parameters">  <h3 class="title">Parameters</h3>  <p class="para">   <dl>    <dt>     <span class="term"><i><tt class="parameter">array</tt></i></span>     <dd>      <p class="para">       The input array.      </p>     </dd>    </dt>    <dt>     <span class="term"><i><tt class="parameter">sort_flags</tt></i></span>     <dd>      <p class="para">       You may modify the behavior of the sort using the optional       parameter <i><tt class="parameter">sort_flags</tt></i>, for details       see <a href="function.sort.html" class="function">sort()</a>.      </p>     </dd>    </dt>   </dl>  </p> </div> <div class="refsect1 returnvalues">  <h3 class="title">Return Values</h3>  <p class="para">   Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure.  </p> </div> <div class="refsect1 examples">  <h3 class="title">Examples</h3>  <p class="para">   <div class="example">    <p><b>Example #1 <b>asort()</b> example</b></p>    <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />$fruits&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"d"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"lemon"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"a"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"orange"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"b"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"banana"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"c"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"apple"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">asort</span><span style="color: #007700">(</span><span style="color: #0000BB">$fruits</span><span style="color: #007700">);<br />foreach&nbsp;(</span><span style="color: #0000BB">$fruits&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$key&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"$key&nbsp;=&nbsp;$val\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>    </div>    <div class="example-contents"><p>The above example will output:</p></div>    <div class="example-contents"><pre><div class="cdata"><pre>c = appleb = bananad = lemona = orange</pre></div>    </pre></div>    <div class="example-contents"><p>     The fruits have been sorted in alphabetical order, and the index     associated with each element has been maintained.    </p></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.arsort.html" class="function" rel="rdfs-seeAlso">arsort()</a></li>    <li class="member"><a href="function.sort.html" class="function" rel="rdfs-seeAlso">sort()</a></li>    <li class="member"><a href="function.ksort.html" class="function" rel="rdfs-seeAlso">ksort()</a></li>    <li class="member"><a href="function.rsort.html" class="function" rel="rdfs-seeAlso">rsort()</a></li>   </ul>  </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.arsort.html">arsort</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.compact.html">compact</a></div> <div class="up"><a href="ref.array.html">Array Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>
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