<!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>Sort the entries by key</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="arrayobject.getiteratorclass.html">ArrayObject::getIteratorClass</a></div>
<div class="next" style="text-align: right; float: right;"><a href="arrayobject.natcasesort.html">ArrayObject::natcasesort</a></div>
<div class="up"><a href="class.arrayobject.html">ArrayObject</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="arrayobject.ksort" class="refentry">
<div class="refnamediv">
<h1 class="refname">ArrayObject::ksort</h1>
<p class="verinfo">(PHP 5 >= 5.2.0)</p><p class="refpurpose"><span class="refname">ArrayObject::ksort</span> — <span class="dc-title">Sort the entries by key</span></p>
</div>
<div class="refsect1 description" id="refsect1-arrayobject.ksort-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>ArrayObject::ksort</strong></span>
( <span class="methodparam">void</span>
)</div>
<p class="para rdfs-comment">
Sorts the entries by key, maintaining key to entry correlations. This is
useful mainly for associative arrays.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-arrayobject.ksort-parameters">
<h3 class="title">Parameters</h3>
<p class="para">This function has no parameters.</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-arrayobject.ksort-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
No value is returned.
</p>
</div>
<div class="refsect1 examples" id="refsect1-arrayobject.ksort-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3986">
<p><strong>Example #1 <span class="function"><strong>ArrayObject::ksort()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$fruits </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"d" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"lemon"</span><span style="color: #007700">, </span><span style="color: #DD0000">"a" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"orange"</span><span style="color: #007700">, </span><span style="color: #DD0000">"b" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"banana"</span><span style="color: #007700">, </span><span style="color: #DD0000">"c" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"apple"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$fruitArrayObject </span><span style="color: #007700">= new </span><span style="color: #0000BB">ArrayObject</span><span style="color: #007700">(</span><span style="color: #0000BB">$fruits</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$fruitArrayObject</span><span style="color: #007700">-></span><span style="color: #0000BB">ksort</span><span style="color: #007700">();<br /><br />foreach (</span><span style="color: #0000BB">$fruitArrayObject </span><span style="color: #007700">as </span><span style="color: #0000BB">$key </span><span style="color: #007700">=> </span><span style="color: #0000BB">$val</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$key</span><span style="color: #DD0000"> = </span><span style="color: #0000BB">$val</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<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 screen">
<div class="cdata"><pre>
a = orange
b = banana
c = apple
d = lemon
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-arrayobject.ksort-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="methodname"><a href="arrayobject.asort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::asort()</a> - Sort the entries by value</span></li>
<li class="member"> <span class="methodname"><a href="arrayobject.natsort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::natsort()</a> - Sort entries using a "natural order" algorithm</span></li>
<li class="member"> <span class="methodname"><a href="arrayobject.natcasesort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::natcasesort()</a> - Sort an array using a case insensitive "natural order" algorithm</span></li>
<li class="member"> <span class="methodname"><a href="arrayobject.uasort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::uasort()</a> - Sort the entries with a user-defined comparison function and maintain key association</span></li>
<li class="member"> <span class="methodname"><a href="arrayobject.uksort.html" class="methodname" rel="rdfs-seeAlso">ArrayObject::uksort()</a> - Sort the entries by keys using a user-defined comparison function</span></li>
</ul>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="arrayobject.getiteratorclass.html">ArrayObject::getIteratorClass</a></div>
<div class="next" style="text-align: right; float: right;"><a href="arrayobject.natcasesort.html">ArrayObject::natcasesort</a></div>
<div class="up"><a href="class.arrayobject.html">ArrayObject</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
