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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.10 $ -->
<!-- splitted from ./en/functions/strings.xml, last change in rev 1.8 -->
<refentry id="function.strrpos">
<refnamediv>
<refname>strrpos</refname>
<refpurpose>
Find position of last occurrence of a char in a string
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>int</type><methodname>strrpos</methodname>
<methodparam><type>string</type><parameter>haystack</parameter></methodparam>
<methodparam><type>string</type><parameter>needle</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>offset</parameter></methodparam>
</methodsynopsis>
<para>
Returns the numeric position of the last occurrence of
<parameter>needle</parameter> in the
<parameter>haystack</parameter> string. Note that the needle in
this case can only be a single character in PHP 4. If a string is passed
as the needle, then only the first character of that string will
be used.
</para>
<para>
If <parameter>needle</parameter> is not found, returns &false;.
</para>
<para>
It is easy to mistake the return values for "character found at
position 0" and "character not found". Here's how to detect
the difference:
<informalexample>
<programlisting role="php">
<![CDATA[
<?php
// in PHP 4.0b3 and newer:
$pos = strrpos($mystring, "b");
if ($pos === false) { // note: three equal signs
// not found...
}
// in versions older than 4.0b3:
$pos = strrpos($mystring, "b");
if (is_bool($pos) && !$pos) {
// not found...
}
?>
]]>
</programlisting>
</informalexample>
</para>
<para>
If <parameter>needle</parameter> is not a string, it is converted
to an integer and applied as the ordinal value of a character.
</para>
<note>
<simpara>
As of PHP 5.0.0 <parameter>offset</parameter> may
be specified to begin searching an arbitrary number of characters into
the string. Negative values will stop searching at an arbitrary point
prior to the end of the string.
</simpara>
</note>
<note>
<simpara>
The <parameter>needle</parameter> may be a string of more than one
character as of PHP 5.0.0.
</simpara>
</note>
<para>
See also <function>strpos</function>,
<function>strripos</function>,
<function>strrchr</function>,
<function>substr</function>,
<function>stristr</function>, and
<function>strstr</function>.
</para>
</refsect1>
</refentry>
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