3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "0 : "; if (filter_var('0', FILTER_VALIDATE_INT)) { echo "OK\n"; } else { echo "Not OK\n"; } echo "1 : "; if (filter_var('1', FILTER_VALIDATE_INT)) { echo "OK\n"; } else { echo "Not OK\n"; }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
0 : Not OK 1 : OK
preferences:
147.98 ms | 408 KiB | 5 Q