📄 function.array-reverse.html
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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>Return an array with elements in reverse order</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.array-reduce.html">array_reduce</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.array-search.html">array_search</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.array-reverse" class="refentry"> <div class="refnamediv"> <h1 class="refname">array_reverse</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">array_reverse</span> — <span class="dc-title">Return an array with elements in reverse order</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>array_reverse</b></b></span> ( <span class="methodparam"><span class="type">array</span> <tt class="parameter">$array</tt></span> [, <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$preserve_keys</tt></span> ] )</div> <p class="para rdfs-comment"> Takes an input <i><tt class="parameter">array</tt></i> and returns a new array with the order of the elements reversed. </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">preserve_keys</tt></i></span> <dd> <p class="para"> If set to <b><tt>TRUE</tt></b> keys are preserved. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the reversed array. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.0.3</td> <td colspan="1" rowspan="1" align="left"> The <i><tt class="parameter">preserve_keys</tt></i> parameter was added. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>array_reverse()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$input </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"php"</span><span style="color: #007700">, </span><span style="color: #0000BB">4.0</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"green"</span><span style="color: #007700">, </span><span style="color: #DD0000">"red"</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_reverse</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$result_keyed </span><span style="color: #007700">= </span><span style="color: #0000BB">array_reverse</span><span style="color: #007700">(</span><span style="color: #0000BB">$input</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p> This makes both <var class="varname">$result</var> and <var class="varname">$result_keyed</var> have the same elements, but note the difference between the keys. The printout of <var class="varname">$result</var> and <var class="varname">$result_keyed</var> will be: </p></div> <div class="example-contents"><pre><div class="cdata"><pre>Array( [0] => Array ( [0] => green [1] => red ) [1] => 4 [2] => php)Array( [2] => Array ( [0] => green [1] => red ) [1] => 4 [0] => php)</pre></div> </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="function.array-flip.html" class="function" rel="rdfs-seeAlso">array_flip()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.array-reduce.html">array_reduce</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.array-search.html">array_search</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>⌨️ 快捷键说明
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