3v4l.org

run code in 300+ PHP versions simultaneously
<?php $resultset = [ ['id' => '1a', 'parent' => null], ['id' => '2a', 'parent' => null], ['id' => '3a', 'parent' => '1a'], ['id' => '4a', 'parent' => null], ['id' => '5a', 'parent' => '3a'], ['id' => '6a', 'parent' => '5a'], ['id' => '7a', 'parent' => null], ['id' => '8a', 'parent' => '3a'] ]; function findParent(&$array, $parent = 0, $children = []){ // make $array modifiable foreach ($array as $i => &$row) { // make $row modifiable if ($parent) { // if not zero if ($id == $parent) { // found parent unset($array[$i]['parent']); $row = $children; // append child to parent's children subarray } elseif (!empty($row)) { // go down rabbit hole looking for parent findParent($row, $parent, $children); // look deeper for parent while preserving the initial parent_id and row // $row = $row['children']; } // else continue; } elseif ($row['parent']) { // child requires adoption unset($array[$i]); // remove child from level because it will be store elsewhere and won't be its own parent (reduce iterations in next loop & avoid infinite recursion) findParent($array, $row['parent'], $row); // look for parent using parent_id while carrying the entire row as the childarray } // else continue; } return $array; // return the modified array } var_export(findParent($resultset));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 array ( 0 => array ( 'id' => '1a', 'parent' => NULL, ), 1 => array ( 'id' => '2a', 'parent' => NULL, ), 3 => array ( 'id' => '4a', 'parent' => NULL, ), 6 => array ( 'id' => '7a', 'parent' => NULL, ), )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: Undefined variable $id in /in/tdj4B on line 17 Warning: foreach() argument must be of type array|object, string given in /in/tdj4B on line 15 Warning: Undefined variable $id in /in/tdj4B on line 17 array ( 0 => array ( 'id' => '1a', 'parent' => NULL, ), 1 => array ( 'id' => '2a', 'parent' => NULL, ), 3 => array ( 'id' => '4a', 'parent' => NULL, ), 6 => array ( 'id' => '7a', 'parent' => NULL, ), )
Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Notice: Undefined variable: id in /in/tdj4B on line 17 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Notice: Undefined variable: id in /in/tdj4B on line 17 array ( 0 => array ( 'id' => '1a', 'parent' => NULL, ), 1 => array ( 'id' => '2a', 'parent' => NULL, ), 3 => array ( 'id' => '4a', 'parent' => NULL, ), 6 => array ( 'id' => '7a', 'parent' => NULL, ), )
Output for 7.3.32 - 7.3.33
Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 Warning: Invalid argument supplied for foreach() in /in/tdj4B on line 15 array ( 0 => array ( 'id' => '1a', 'parent' => NULL, ), 1 => array ( 'id' => '2a', 'parent' => NULL, ), 3 => array ( 'id' => '4a', 'parent' => NULL, ), 6 => array ( 'id' => '7a', 'parent' => NULL, ), )
preferences:
188.25 ms | 409 KiB | 172 Q