PHP strrpos() Function – Find the Last Occurrence of a Substring

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

Explanation: Returns the numeric position of the needle in the haystack. In PHP 4 the 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

Returns the position of needle if found, or FALSE otherwise.

Example 1

<?php
$mystring = 'abcdefg';
$pos = strrpos($mystring, "b");
if ($pos === false) {
    // not found...
}
?>

Example 2

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