stripos

(PHP 5)

stripos --  Find position of first occurrence of a case-insensitive string

Description

int stripos ( string haystack, string needle [, int offset] )

Returns the numeric position of the first occurrence of needle in the haystack string. Unlike strpos(), stripos() is case-insensitive.

Note that the needle may be a string of one or more characters.

If needle is not found, stripos() will return boolean FALSE.

Warning

This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

Example 1. stripos() examples

<?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";
}
?>

If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.

The optional offset parameter allows you to specify which character in haystack to start searching. The position returned is still relative to the beginning of haystack.

Note: This function is binary-safe.

See also strpos(), strrpos(), strrchr(), substr(), stristr(), strstr(), strripos() and str_ireplace().