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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.11 $ -->
<!-- splitted from ./en/functions/array.xml, last change in rev 1.2 -->
<refentry id="function.array-slice">
<refnamediv>
<refname>array_slice</refname>
<refpurpose>Extract a slice of the array</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>array</type><methodname>array_slice</methodname>
<methodparam><type>array</type><parameter>array</parameter></methodparam>
<methodparam><type>int</type><parameter>offset</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>length</parameter></methodparam>
<methodparam choice="opt"><type>bool</type><parameter>preserve_keys</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_slice</function> returns the sequence of elements
from the array <parameter>array</parameter> as specified by the
<parameter>offset</parameter> and <parameter>length</parameter>
parameters.
</para>
<para>
If <parameter>offset</parameter> is non-negative, the sequence will
start at that offset in the <parameter>array</parameter>. If
<parameter>offset</parameter> is negative, the sequence will
start that far from the end of the <parameter>array</parameter>.
</para>
<para>
If <parameter>length</parameter> is given and is positive, then
the sequence will have that many elements in it. If
<parameter>length</parameter> is given and is negative then the
sequence will stop that many elements from the end of the
array. If it is omitted, then the sequence will have everything
from <parameter>offset</parameter> up until the end of the
<parameter>array</parameter>.
</para>
<para>
Note that <function>array_slice</function> will reset the array keys by
default. Since PHP 5.0.2, you can change this behaviour by setting
<parameter>preserve_keys</parameter> to &true;.
</para>
<para>
<example>
<title><function>array_slice</function> examples</title>
<programlisting role="php">
<![CDATA[
<?php
$input = array("a", "b", "c", "d", "e");
$output = array_slice($input, 2); // returns "c", "d", and "e"
$output = array_slice($input, -2, 1); // returns "d"
$output = array_slice($input, 0, 3); // returns "a", "b", and "c"
// note the differences in the array keys
print_r(array_slice($input, 2, -1));
print_r(array_slice($input, 2, -1, true));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Array
(
[0] => c
[1] => d
)
Array
(
[2] => c
[3] => d
)
]]>
</screen>
</example>
</para>
<para>
See also <function>array_splice</function> and
<function>unset</function>.
</para>
</refsect1>
</refentry>
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