# Find File Extension In PHP

23rd February 2009 - 1 minute read time

This simple code example uses a combination of strrchr to find the last occurrence of a string and substr to return part of the string in order to find the file extension for a given filename. This is ideal if you want to quickly find a file extension.

$ext = substr(strrchr($fileName, '.'), 1);

This code can be used in the following way.

$fileName = '\path\to\file\afile.wibble';$ext = substr(strrchr($fileName, '.'), 1);echo$ext;

The output here is 'wibble';