3v4l.org

run code in 300+ PHP versions simultaneously
<?php function create_tree($arr,$pid=0) { $ret = array(); foreach($arr as $k => $v) { if($v['pid'] == $pid) { $tmp = $arr[$k];unset($arr[$k]); $tmp['children'] = create_tree($arr,$v['id']); $ret[] = $tmp; } } return $ret; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 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
preferences:
237.35 ms | 406 KiB | 392 Q