3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = 2; $j = &$i; echo (++$i) + (++$i);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.14
7
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
8
preferences:
180.67 ms | 407 KiB | 5 Q