PHP

php password validation regex

$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
}

regex php password

^(?=P{Ll}*p{Ll})(?=P{Lu}*p{Lu})(?=P{N}*p{N})(?=[p{L}p{N}]*[^p{L}p{N}])[sS]{8,}$