Checks the strength of a password and return an integer value depening on it's strength
PHP Code:
function CheckPasswordStrength($password)
{
$strength = 0;
$patterns = array('#[a-z]#','#[A-Z]#','#[0-9]#','/[¬!"£$%^&*()`{}\[\]:@~;\'#<>?,.\/\\-=_+\|]/');
foreach($patterns as $pattern)
{
if(preg_match($pattern,$password,$matches))
{
$strength++;
}
}
return $strength;
// 1 - weak
// 2 - not weak
// 3 - acceptable
// 4 - strong
}
//usage
CheckPasswordStrength('password'); //1
CheckPasswordStrength('Password'); //2
CheckPasswordStrength('P4ssword'); //3
CheckPasswordStrength('P4ssw()rd'); //4