3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(str_replace('.','',phpversion()) < 523);
Output for 4.3.10 - 4.3.11, 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0 - 7.3.1
bool(false)
Output for 4.3.0 - 4.3.9, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
bool(true)

preferences:
138.43 ms | 402 KiB | 191 Q