3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump('f' . 1 . 2); var_dump('f' . 1.2);
Output for 5.6.0 - 5.6.40, 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 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
string(3) "f12" string(4) "f1.2"
preferences:
78 ms | 407 KiB | 5 Q