function modulus($a, $b) { if (validateZero($b)) { return errorMessages($a, $b, 'divide by zero'); } elseif (validateNumber($a, $b)) { return $a % $b; } }
function modulus($a, $b) { if (areValidInputs($a, $b)) { if (isZero($b)) { return "ERROR: Cannot modulus by zero . Try again. Got {$b}." . PHP_EOL; } return $a % $b; } else { return errorMessages($a, $b); } }