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

Sorry... "Short Question; But NOT Short Answer"

Example 1 for PATH

$path = "/home/ali/public_html/wp-content/themes/chicken/css/base.min.css";
$name = pathinfo($path, PATHINFO_FILENAME);
$ext  = pathinfo($path, PATHINFO_EXTENSION);
printf('
 Name: %s 
 Extension: %s', $name, $ext);

Example 2 for URL

$url = "//www.example.com/dir/file.bak.php?Something+is+wrong=hello";
$url = parse_url($url);
$name = pathinfo($url['path'], PATHINFO_FILENAME);
$ext  = pathinfo($url['path'], PATHINFO_EXTENSION);
printf('
 Name: %s 
 Extension: %s', $name, $ext);

Output of example 1:

Name: base.min
Extension: css

Output of example 2:

Name: file.bak
Extension: php

References

1. https://www.php.net/manual/en/function.pathinfo.php

2. https://www.php.net/manual/en/function.realpath.php

3. https://www.php.net/manual/en/function.parse-url.php