3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $c = $a + $a + $a++; var_dump($c);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.29, 7.4.0 - 7.4.22, 8.0.0 - 8.0.8
int(3)

preferences:
290.6 ms | 461 KiB | 5 Q