3v4l.org

run code in 300+ PHP versions simultaneously
<??>foo< ?=$foo?>bar
Output for 5.3.0 - 5.3.29, 7.2.29 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<??>foo< ?=$foo?>bar
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6, 7.3.32 - 7.3.33, 7.4.26, 7.4.33, 8.0.13
foo< ?=$foo?>bar

preferences:
198.22 ms | 403 KiB | 286 Q