3v4l.org

run code in 500+ PHP versions simultaneously
<?php $input = array('num' => '42'); $spec = array('num' => FILTER_VALIDATE_INT); $filtered = filter_var_array($input, $spec); var_dump($input, $filtered); // string became int, etc
Output for 5.6.0 - 5.6.24, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
array(1) { ["num"]=> string(2) "42" } array(1) { ["num"]=> int(42) }
preferences:
109.38 ms | 1688 KiB | 4 Q