3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = range(3, 9); foreach ($a as $b) { switch($b) { case 3: $b = 7; case 7: $b = 3; default: // do nothing } } echo implode('-', $a) . PHP_EOL; $a = range(3, 9); foreach ($a as $key => $b) { switch($b) { case 3: $a[$key] = 7; case 7: $a[$key] = 3; default: // do nothing } } echo implode('-', $a) . PHP_EOL; $a = range(3, 9); foreach ($a as &$b) { switch($b) { case 3: $b = 7; case 7: $b = 3; default: // do nothing } } echo implode('-', $a) . PHP_EOL;
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.4, 7.0.6 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
3-4-5-6-7-8-9 3-4-5-6-3-8-9 3-4-5-6-3-8-9
Output for 7.0.5
3-4-5-6-7-8-9 3-4-5-6-3-8-9 3-4-5-6-7-8-9
preferences:
226.73 ms | 401 KiB | 330 Q