3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = '1.23'; var_dump(is_numeric($a)); var_dump(is_numeric(str_repeat($a, 5)));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
bool(true) bool(false)
preferences:
55.14 ms | 402 KiB | 62 Q