Function to checking the password's pattern and its length

#******************************************************************************
#function to checking the password's pattern and its length
#******************************************************************************
function checkPasswordAndStrength($password) {

$strength = 0;
$patterns = array(
'#[a-z]#',
'#[A-Z]#',
'#[0-9]#',
);

foreach($patterns as $pattern) {
if(preg_match($pattern, $password, $matches)) {
$strength++;
}
}

if(strlen($password) >= 8) {
$strength++;
}

return $strength;

}

#************************************************************************