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<?php $arr = ['level', 'sub', 'item']; $arr = array_reverse($arr); $new =[]; foreach($arr as $key => $item){ if($key ==0){ $new = [$item => []]; }else{ $new = [$item => $new]; } } $other = array ( 'level' => array ( 'sub' => array ( 'AnotherItem' => array ( ), ), ), ); $new = array_merge_recursive($new, $other); var_export($new);
Output for 5.6.38, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 'level' => array ( 'sub' => array ( 'item' => array ( ), 'AnotherItem' => array ( ), ), ), )
preferences:
119.53 ms | 1625 KiB | 4 Q