How do I get a file extension in PHP?

Question

This is a question you can read everywhere on the web with various answers:

$ext = end(explode(\'.\', $filename));
$ext = substr(strrchr($filename, \'.\'), 1         


        

Answer 1

Example URL: http://example.com/myfolder/sympony.mp3?a=1&b=2#XYZ

A) Don't use suggested unsafe PATHINFO:

pathinfo($url)['dirname']