3v4l.org

run code in 300+ PHP versions simultaneously
<?php $pages = array( 'a' => '/pages/first', 'b' => '/pages/another', 'c' => '/pages/third', 'd' => '/pages/something-else' ); $current = 'a'; reset($pages); do { $a = key($pages); next($pages); $b = key($pages); next($pages); $c = key($pages); if ($b == $current) { break; } } while(true); var_dump($a,$b,$c);
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6

Process exited with code 137.
preferences:
210.97 ms | 404 KiB | 227 Q