Online PHP editor | refs for BYbU9

<?php $arr = [ 1=>['id'=>1,'name'=>'父1','father'=>NULL], 2=>['id'=>2,'name'=>'父2','father'=>NULL], 3=>['id'=>3,'name'=>'父3','father'=>NULL], 4=>['id'=>4,'name'=>'儿1-1','father'=>1], 5=>['id'=>5,'name'=>'儿1-2','father'=>1], 6=>['id'=>6,'name'=>'儿1-3','father'=>1], 7=>['id'=>7,'name'=>'儿2-1','father'=>2], 8=>['id'=>8,'name'=>'儿2-1','father'=>2], 9=>['id'=>9,'name'=>'儿3-1','father'=>3], 10=>['id'=>10,'name'=>'儿3-1-1','father'=>9], 11=>['id'=>11,'name'=>'儿1-1-1','father'=>4], 12=>['id'=>12,'name'=>'儿2-1-1','father'=>7], ]; function generateTree($items){ $tree = array(); foreach($items as $item){ if(isset($items[$item['father']])){ $items[$item['father']]['son'][$item['id']] = &$items[$item['id']]; }else{ $tree[] = &$items[$item['id']]; } } return $tree; } $tree = generateTree($arr); print_r($tree);