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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<refentry id="function.stripos">
<refnamediv>
<refname>stripos</refname>
<refpurpose>
Find position of first occurrence of a case-insensitive string
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>int</type><methodname>stripos</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 first occurrence of
<parameter>needle</parameter> in the <parameter>haystack</parameter>
<type>string</type>. Unlike <function> strpos</function>,
<function>stripos</function> is case-insensitive.
</para>
<para>
Note that the <parameter>needle</parameter> may be a string of one or
more characters.
</para>
<para>
If <parameter>needle</parameter> is not found,
<function>stripos</function> will return <type>boolean</type> &false;.
</para>
&return.falseproblem;
<para>
<example>
<title><function>stripos</function> examples</title>
<programlisting role="php">
<![CDATA[
<?php
$findme = 'a';
$mystring1 = 'xyz';
$mystring2 = 'ABC';
$pos1 = stripos($mystring1, $findme);
$pos2 = stripos($mystring2, $findme);
// Nope, 'a' is certainly not in 'xyz'
if ($pos1 === false) {
echo "The string '$findme' was not found in the string '$mystring1'";
}
// Note our use of ===. Simply == would not work as expected
// because the position of 'a' is the 0th (first) character.
if ($pos2 !== false) {
echo "We found '$findme' in '$mystring2' at position $pos2";
}
?>
]]>
</programlisting>
</example>
</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>
<para>
The optional <parameter>offset</parameter> parameter allows you
to specify which character in <parameter>haystack</parameter> to
start searching. The position returned is still relative to the
beginning of <parameter>haystack</parameter>.
</para>
¬e.bin-safe;
<para>
See also <function>strpos</function>, <function>strrpos</function>,
<function>strrchr</function>, <function>substr</function>,
<function>stristr</function>, <function>strstr</function>,
<function>strripos</function> and <function>str_ireplace</function>.
</para>
</refsect1>
</refentry>
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