Question

I’m looking for a php preg replace to null/empty string if string contains any non alphanumeric characters or spaces

e.g. Strings

$string = "This string is ok";
$string = "Thi$ string is NOT ok, and should be emptied"

When I say emptied/nulled I mean it will make the string “”.

So basically anything a-z A-Z 0-9 or space is ok

Any ideas?

Answer 1

if(preg_match('~[^a-z0-9 ]~i', $str))
      $str = '';