数组转二叉树数组 引用方式 //数组转树形数组 形参最后一个值 boll true:重置索引 false:保留key 默认:true protected function arrToTree($array,string $childrenKey = 'children',string $key='id',string $pkey='pid'){ $args = func_get_args(); $reindex = !end($args); $items = []; foreach($array as $v) $items[$v[$key]] = $v; foreach($items as $item) $reindex ? $items[$item[$pkey]][$childrenKey][$item[$key]] = &$items[$item[$key]] : $items[$item[$pkey]][$childrenKey][] = &$items[$item[$key]]; return isset($items[0][$childrenKey]) ? $items[0][$childrenKey] : []; }