Regex for password PHP [duplicate]

Answer 1

I find that doing it in one big regex is a bit of a code maintenance nightmare. Splitting it up is far easier to figure out for someone else looking at your code, and it allows you to give more specific error messages as well.

$uppercase = preg_match('@[A-Z]@', $password);
$lowercase = preg_match('@[a-z]@', $password);
$number    = preg_match('@[0-9]@', $password);

if(!$uppercase || !$lowercase || !$number || strlen($password) < 8) {
  // tell the user something went wrong
}