PHP strripos() Function: Case‑Insensitive Search for the Last Occurrence

The PHP strripos() function searches for the last occurrence of a needle string within a haystack string without regard to case, returning the zero‑based position or FALSE if the needle is not found.

Parameters haystack – the string to be searched. needle – the string or character to locate. offset (optional) – an integer offset; a negative value starts the search from the beginning up to that offset.

Return value

Integer position of the needle in the haystack (starting at 0) or FALSE when the needle does not occur.

Example

<?php
$haystack = 'ababcd';
$needle = 'aB';
$pos = strripos($haystack, $needle);
if ($pos === false) {
    echo "Sorry, we did not find ($needle) in ($haystack)";
} else {
    echo "Congratulations!
";
    echo "We found the last ($needle) in ($haystack) at position ($pos)";
}
?>

Output

//Congratulations!
//We found the last (aB) in (ababcd) at position (2)