xiaoshan/application/utils/DataUtil.php

<?php
namespace app\utils;

class DataUtil
{

    public static $_treeArr = [];

    /**
     * 递归
     * @param array $array 数据
     * @param string $index key
     * @param string $pid 父级key
     *
     * @return   array
     */
    public static function recursion($array, $index = 'id', $pid = 'parent_id')
    {
        //第一步 构造数据
        $items = [];
        if(empty($array))
        {
            return [];
        }
        foreach($array as $value)
        {
            $items[$value[$index]] = $value;
        }

        //第二部 遍历数据 生成树状结构
        $tree = array();
        foreach($items as $key => $item)
        {
            if(isset($items[$item[$pid]]))
            {
                $items[$item[$pid]]['children'][] = &$items[$key];
            }else{
                $tree[] = &$items[$key];
            }
        }
        return $tree;
    }

    public static function threeMenus($array, $index = 'id', $pid = 'parent_id'){
        //第一步 构造数据
        $items = [];
        if(empty($array))
        {
            return [];
        }

        foreach($array as $value)
        {
            if ($value[$pid] == 0) {
                $value['open'] = true;
            }else{
                $value['open'] = false;
            }
            $value['spread'] = true;
            $items[$value[$index]] = $value;
        }

        //第二部 遍历数据 生成树状结构
        $tree = array();
        foreach($items as $key => $item)
        {
            if(isset($items[$item[$pid]]))
            {
                $items[$item[$pid]]['children'][] = &$items[$key];
            }else{
                $tree[] = &$items[$key];
            }
        }
        return $tree;
    }

    public static function roleThreeMenus(array $array,array $menu_ids = [], $index = 'id', $pid = 'parent_id'){
        //第一步 构造数据
        $items = [];
        if(empty($array))
        {
            return [];
        }

        $ids = [];
        foreach ($array as $k=>$v){
            if (empty($v[$pid])) continue;
            $ids[] = $v[$pid];
        }

        foreach($array as $value)
        {
            //设置最后一级默认选中
            if (!in_array($value[$index],$ids) && in_array($value[$index],$menu_ids)) $value['checked'] = true;
            $value['spread'] = true;

            $items[$value[$index]] = $value;
        }

        //第二部 遍历数据 生成树状结构
        $tree = array();
        foreach($items as $key => $item)
        {

            if(isset($items[$item[$pid]]))
            {
                $items[$item[$pid]]['children'][] = &$items[$key];
            }else{
                $tree[] = &$items[$key];
            }
        }
        return $tree;
    }

    public static function arrayColumnKey(array $items, $index = 'id'){
        if(empty($items))
            return [];
        $items_arr = [];
        foreach ($items as $val)
        {
            if(!isset($val[$index]))
                return [];
            $items_arr[$val[$index]] = $val;
        }
        unset($items);
        return $items_arr;
    }

    /**
     * stringToArray
     * 把字符串转换为数组
     *
     * @param string $string  需要处理的字符串
     * @access common
     * @since 1.0
     * @return array
     */
    public static function stringToArray($string){
        /*以逗号切割字符串;转换成数组*/
        if (empty($string)) return [];
        $items = explode(',', $string);
        if(empty($items)){
            return [];
        }
        /*处理数组 先删除数组的空元素 去除重复值, 然后value数组，使数组的key保持统一*/
        $items = array_values(array_unique(array_filter($items)));
        if(empty($items)){
            return [];
        }
        return $items;
    }

    /**
     * 表单字段为空初始化
     * 注意，仅用于类似后台
     * @param array $fields
     * @param array $unset_fields 销毁指定字段
     * @return array
     */
    public static function field(array $fields,array $unset_fields)
    {
        foreach ($fields as $key => $val){
            if ($val == 'null' || $val == null || $val == 'undefined'){
                unset($fields[$key]);
            }
            // 销毁指定字段
            if (in_array($key,$unset_fields)){
                unset($fields[$key]);
            }
        }
        return $fields;
    }
}