

<?php

/**
 * Check password strength (1/2)
 * @param string $password password to check
 * @return bool - true or false
 */
function isStrongPassword(string $password): bool
{
    // min. 8 Zeichen, 1 Kleinbuchstabe, 1 Großbuchstabe, 1 Zahl, 1 Sonderzeichen
    return (bool) preg_match(
        '/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^a-zA-Z0-9]).{8,}$/',
        $password
    );
}

/**
 * Check password strength (2/2)
 * @param string $password password to check
 * @return bool - true or false
 */
function checkPasswordStrength(string $password): bool {
    $strength = 0;

    //check length
    $length = strlen($password);
    if($length >= 8) $strength++;
   
    //check if caps 
    if(preg_match('/[A-Z]/', $password)) $strength++;

    //check if lower cases 
    if(preg_match('/[a-z]/', $password)) $strength++;

    //check if numbers 
    if(preg_match('/[0-9]/', $password)) $strength++;

    //check if spec. chars 
    if(preg_match('/[^a-zA-Z0-9]/', $password)) $strength++;

    return($strength >= 5);
   

}