strrchr()

strrchr() — Find the last occurrence of a character in a string.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

This function returns the portion of haystack which starts at the last occurrence of needle and goes until the end of haystack.

Signature

strrchr(string $haystack, string $needle, bool $before_needle = false): string|false

Parameters

Parameter	Type	What it takes
$haystack	string	The string to search in
$needle	string	If needle contains more than one character, only the first is used. This behavior is different from that of strstr().
$before_needle	bool	If true, strrchr() returns the part of the haystack before the last occurrence of the needle (excluding the needle).

Return value

This function returns the portion of string, or false if needle is not found.

Example

A runnable snippet:

$ext = strrchr('somefile.txt', '.'); echo "file extension: $ext \n"; $ext = $ext ? strtolower(substr($ext, 1)) : ''; echo "file extension: $ext";

Output:

file extension: .txt file extension: txt

Changelog

Version	Change
8.3.0	The before_needle parameter was added.
8.0.0	needle now accepts an empty string.
8.0.0	Passing an int as needle is no longer supported.
7.3.0	Passing an int as needle has been deprecated.