Search for a certain function in all helper files?

[eluser]Nummero2[/eluser]
My dode now:

$helpers = glob(APPPATH.'helpers/*_helper.php');

$line = '';

preg_match('/^_helper_test (.+?)\(/',$line);



echo var_dump( $line );

is that correct? For $line I just get an empty string dumped on the screen. Also I can´t find an explanation for the used function in detail (.+?)etc.

Besides that what does that do know. Searching all helper files for the function and put them into the variable $line?