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

Here is an example. Suppose $filename is "example.txt",

$ext = substr($filename, strrpos($filename, '.', -1), strlen($filename));

So $ext will be ".txt".