I am trying to validate if a new user account's password is matching these criterias: Between 8-30 characters long Contains at least 1 lowercase letter (a-z) Contains at least 1 uppercase letter (A-Z)...

PHP – Password RegEx requirements

I am trying to validate if a new user account’s password is matching these criterias:

I have a function like this:

function validPassword($str) {
    return preg_match("^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[_-!#*@&])[A-Za-zd_-!#*@&]{8,30}$", $str);
}

JavaScript
​x
 
function validPassword($str) {    return preg_match("^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[_-!#*@&])[A-Za-zd_-!#*@&]{8,30}$", $str);}​

But I am getting an error. It should return “true” for this password for example: HelloWorld123!

But instead it is returning false. Any idea what may be wrong?

if (validPassword($password) == true) {
  // good password
}

JavaScript
 
if (validPassword($password) == true) {  // good password}​

You forgot to escape ‘-‘, and delimiters…

function validPassword($str) {
  return preg_match("/^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[_-!#*@&])[A-Za-zd_-!#*@&]{8,30}$/", $str);
}

JavaScript
 
function validPassword($str) {  return preg_match("/^(?=.*[a-z])(?=.*[A-Z])(?=.*d)(?=.*[_-!#*@&])[A-Za-zd_-!#*@&]{8,30}$/", $str);}​