3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str = "-$251"; echo filter_var($str, FILTER_SANITIZE_NUMBER_INT);
Output for 7.4.0 - 7.4.33, 8.0.1 - 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 - 8.5.7
-251
preferences:
85.97 ms | 1249 KiB | 4 Q