3v4l.org

run code in 500+ PHP versions simultaneously
<?php $test1 = $test2 = ['foo', 'bar']; foreach ($test1 as &$v) { $v = ['name' => $v]; } foreach ($test2 ?? [] as &$v) { $v = ['name' => $v]; } print_r($test1); print_r($test2);
Output for 7.1.25, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.6
Array ( [0] => Array ( [name] => foo ) [1] => Array ( [name] => bar ) ) Array ( [0] => foo [1] => bar )
preferences:
113.65 ms | 1410 KiB | 4 Q