3v4l.org

run code in 300+ PHP versions simultaneously
<?php switch(1) { default:echo 'a';break; default:echo 'b';break; }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
b
preferences:
194.78 ms | 1400 KiB | 109 Q