Question

I have a PHP file with PHP Variables inside.
Example:

Hi <?=$username?>,
Can you please send me an email ?

I would like to list from an outside file, every PHP variables in this file.
Something that would return:

Array(
   'username'
);

I know there is a PHP function called get_defined_vars, but this is an external file.
Is there a way to get all PHP vars from an external file ?

Thank you

Answer 1

Use file_get_contents() and preg_match_all():

$file = file_get_contents('file.php'); 
preg_match_all('/\$[A-Za-z0-9_]+/', $file, $vars);

print_r($vars[0]);