0) { for ($age = 32; $age <= $ageLimit; $age++) { $primenum = true; for($denominator = 2; $denominator <= $age/2; $denominator++) { if(((float)$age % (float)$denominator) == 0.0) { $primenum = false; break; } } if ((bool)$primenum) { $out[] = $age; $countNextBdays--; if($countNextBdays == 0){ break; } } } } return $out; } echo json_encode(getNextPrimeBdays(32,10));