Find the extension of a file using php

Question

What is the simple way to find the file extension in php, if the filename is filename.jpg.txt?

Answer 1

you can use the pathinfo function that will provide useful info about the file path, including the extension

http://php.net/pathinfo

Answer 2

You can try splitting the string with explode(".", $string); and then checking the last element of the array that is returned.

Answer 3

function file_extension($filename)
{
    $path_info = pathinfo($filename);
    return $path_info['extension'];
}

Use this function get the file's actual type