$5 paypal to the person that can solve this super easy regex problem

[subduck]

Probably through preg_replace, I need help creating a function that removes all characters in a string excluding the following characters: a-z 0-9 space

Example:
$string = 'hello & wo^^rld $ #__sig@@n says% hi!!!
tes*ti@@ng 012__3
n**#)@ow';

output should be:

hello world sign says hi
testing 0123
now

[AlienDev]

preg_replace('~[^0-9a-zA-Z ]~', '', $text);

[subduck]

pm me your paypal address, that worked perfectly thanks