3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(is_numeric('123')); var_dump(is_numeric(123)); var_dump(is_numeric(true));
Output for 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(true) bool(true) bool(false)

preferences:
195.8 ms | 403 KiB | 243 Q