3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isValidTimeStamp($timestamp) { return ((string) (int) $timestamp === $timestamp) && ($timestamp <= PHP_INT_MAX) && ($timestamp >= ~PHP_INT_MAX); } var_dump(isValidTimestamp("114004965600"));
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(true)
preferences:
182.78 ms | 404 KiB | 231 Q