91 lines
2.9 KiB
PHP
91 lines
2.9 KiB
PHP
<?php
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// +------------------------------------------------+
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// | http://www.cjango.com |
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// +------------------------------------------------+
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// | 修复BUG不是一朝一夕的事情，等我喝醉了再说吧！ |
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// +------------------------------------------------+
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// | Author: 小陈叔叔 <Jason.Chen> |
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// +------------------------------------------------+
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namespace App\Traits;
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/**
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* 生成多层树状下拉选框的工具
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*/
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trait Tree
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{
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/**
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* 用于树型数组完成递归格式的全局变量
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*/
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private static $formatTree;
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/**
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* 生成多层树，供下拉选框使用
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*/
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public static function toFormatTree($list, $title = 'title', $pk = 'id', $pid = 'pid', $root = 0)
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{
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$list = self::list2tree($list, $pk, $pid, '_child', $root);
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self::$formatTree = [];
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self::_toFormatTree($list, 0, $title);
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return self::$formatTree;
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}
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/**
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* 把数据集转换成Tree
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* @param array $list 要转换的数据集
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* @param string $pk [description]
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* @param string $pid [description]
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* @param string $child [description]
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* @param integer $root [description]
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* @return array
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*/
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public static function list2tree($list, $pk = 'id', $pid = 'pid', $child = 'children', $root = 0)
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{
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$tree = [];
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if (is_array($list)) {
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$refer = [];
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foreach ($list as $key => $data) {
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$refer[$data[$pk]] = &$list[$key];
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}
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foreach ($list as $key => $data) {
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$parentId = $data[$pid];
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if ($root == $parentId) {
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$tree[] = &$list[$key];
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} else {
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if (isset($refer[$parentId])) {
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$parent = &$refer[$parentId];
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$parent[$child][] = &$list[$key];
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}
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}
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}
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}
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return $tree;
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}
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/**
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* 将格式数组转换为树
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* @param array $list
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* @param integer $level 进行递归时传递用的参数
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* @author 小陈叔叔 <Jason.Chen[cjango.com]>
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*/
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private static function _toFormatTree($list, $level = 0, $title = 'title')
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{
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foreach ($list as $key => $val) {
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$tmp_str = str_repeat(" ", $level * 4);
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$tmp_str .= "└ ";
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$val['level'] = $level;
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$val['title_show'] = $level == 0 ? $val[$title] . " " : $tmp_str . $val[$title];
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if (!array_key_exists('_child', $val)) {
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array_push(self::$formatTree, $val);
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} else {
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$tmp_ary = $val['_child'];
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unset($val['_child']);
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array_push(self::$formatTree, $val);
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self::_toFormatTree($tmp_ary, $level + 1, $title); //进行下一层递归
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}
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}
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return;
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}
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}
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