Online PHP editor | refs for oKFt9

<?php function check_int($i) { if (preg_match('[^0-9]', $i)) { return 0; } else { return 1; } } function check_int1($i) { return (strval((int)$i) === strval($i)); } echo check_int1("1-0") ? "It's an int\n" : "It's not an int\n"; echo check_int("1-0") ? "It's an int\n" : "It's not an int\n";