<?php
$rows = [
['id' => 1, 'parent_id' => 0, 'name' => 'parent'],
['id' => 2, 'parent_id' => 1, 'name' => 'child'],
['id' => 3, 'parent_id' => 2, 'name' => 'grandchild'],
['id' => 4, 'parent_id' => 0, 'name' => 'parent 2'],
['id' => 5, 'parent_id' => 4, 'name' => 'child 2'],
['id' => 6, 'parent_id' => 1, 'name' => 'child'],
];
function buildTree(array $elements, $parentId = 0) {
$branch = array();
foreach ($elements as $element) {
if ($element['parent_id'] == $parentId) {
$children = buildTree($elements, $element['id']);
if ($children) {
$element['children'] = $children;
}
$branch[] = $element;
}
}
return $branch;
}
$tree = buildTree($rows);
print_r($tree);
preferences:
45.67 ms | 402 KiB | 5 Q