PHP strrpos() Function – Description, Parameters, Return Value, and Examples

strrpos() calculates the position of the last occurrence of a needle string within a haystack string.

Signature:

int strrpos ( string $haystack , string $needle [, int $offset = 0] )

Description: Returns the numeric position of the last occurrence of $needle in $haystack. In PHP 4, $needle must be a single character; if a string is given, only its first character is used.

Parameters: $haystack – the string to search in. $needle – the string to search for; if not a string it is converted to an integer character code. $offset – optional offset; negative values start counting from the end of the string.

Return value: The position of $needle if found, otherwise FALSE.

Examples:

<?php
$foo = "0123456789a123456789b123456789c";
var_dump(strrpos($foo, '7', -5)); // from 5th position from the end, result: int(17)
var_dump(strrpos($foo, '7', 20)); // from position 20, result: int(27)
var_dump(strrpos($foo, '7', 28)); // result: bool(false)
?>