• ecshop中无限处理分类


    数据库表记录结构

     <?php
    $sql = "SELECT c.cat_id, c.cat_name, c.measure_unit, c.parent_id, c.is_show,
    		c.show_in_nav, c.grade, c.sort_order, COUNT(s.cat_id) AS has_children 
    	FROM ecs_category AS c 
    	LEFT JOIN ecs_category AS s ON s.parent_id=c.cat_id 
    	GROUP BY c.cat_id 
    	ORDER BY c.parent_id, c.sort_order ASC";
    //获取以上的数组
    $res = '以上的数组';
    /*
    $res =
    Array
    (
        [0] => Array
            (
                [cat_id] => 1
                [cat_name] => 手机类型
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 5
                [sort_order] => 50
                [has_children] => 4
            )
    
        [1] => Array
            (
                [cat_id] => 18
                [cat_name] => 圭亚那
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [2] => Array
            (
                [cat_id] => 12
                [cat_name] => 充值卡
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 3
            )
    
        [3] => Array
            (
                [cat_id] => 16
                [cat_name] => 服装
                [measure_unit] => 件
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 8
                [sort_order] => 50
                [has_children] => 0
            )
    
        [4] => Array
            (
                [cat_id] => 6
                [cat_name] => 手机配件
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 1
                [grade] => 0
                [sort_order] => 50
                [has_children] => 4
            )
    
        [5] => Array
            (
                [cat_id] => 17
                [cat_name] => 食品
                [measure_unit] => 斤
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 5
                [sort_order] => 50
                [has_children] => 0
            )
    
        [6] => Array
            (
                [cat_id] => 5
                [cat_name] => 双模手机
                [measure_unit] => 
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 5
                [sort_order] => 50
                [has_children] => 0
            )
    
        [7] => Array
            (
                [cat_id] => 2
                [cat_name] => CDMA手机
                [measure_unit] => 
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [8] => Array
            (
                [cat_id] => 3
                [cat_name] => GSM手机
                [measure_unit] => 台
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 1
                [grade] => 4
                [sort_order] => 50
                [has_children] => 1
            )
    
        [9] => Array
            (
                [cat_id] => 4
                [cat_name] => 3G手机
                [measure_unit] => 
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 1
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [10] => Array
            (
                [cat_id] => 19
                [cat_name] => 模型机
                [measure_unit] => 
                [parent_id] => 3
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 3
                [sort_order] => 50
                [has_children] => 2
            )
    
        [11] => Array
            (
                [cat_id] => 8
                [cat_name] => 耳机
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [12] => Array
            (
                [cat_id] => 9
                [cat_name] => 电池
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [13] => Array
            (
                [cat_id] => 11
                [cat_name] => 读卡器和内存卡
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [14] => Array
            (
                [cat_id] => 7
                [cat_name] => 充电器
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [15] => Array
            (
                [cat_id] => 15
                [cat_name] => 联通手机充值卡
                [measure_unit] => 
                [parent_id] => 12
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [16] => Array
            (
                [cat_id] => 13
                [cat_name] => 小灵通/固话充值卡
                [measure_unit] => 
                [parent_id] => 12
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [17] => Array
            (
                [cat_id] => 14
                [cat_name] => 移动手机充值卡
                [measure_unit] => 
                [parent_id] => 12
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
        [18] => Array
            (
                [cat_id] => 20
                [cat_name] => 金属机
                [measure_unit] => 台
                [parent_id] => 19
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 1
            )
    
        [19] => Array
            (
                [cat_id] => 21
                [cat_name] => 塑料机
                [measure_unit] => 台
                [parent_id] => 19
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 1
            )
    
        [20] => Array
            (
                [cat_id] => 23
                [cat_name] => 诺基亚6300
                [measure_unit] => 
                [parent_id] => 20
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 1
                [sort_order] => 50
                [has_children] => 0
            )
    
        [21] => Array
            (
                [cat_id] => 22
                [cat_name] => 三星
                [measure_unit] => 
                [parent_id] => 21
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
            )
    
    )
    */
    
    /*
    优化成等级的分层数组,以 level 决定是第几层缩进,
    $cat_id为指定的分类,$res为上面的数组分组
    */
    $options = cat_options($cat_id, $res);
    function cat_options($spec_cat_id, $arr){
        static $cat_options = array();
         
        if (!isset($cat_options[0]))
        {   
            $level = $last_cat_id = 0;
            $options = $cat_id_array = $level_array = array();
     
            if ($data === false)
            {
                while (!empty($arr))
                {
                    foreach ($arr AS $key => $value)
                    {
     
                        $cat_id = $value['cat_id'];
                         
       
                        if ($level == 0 && $last_cat_id == 0)
                        {   
                            if ($value['parent_id'] > 0)
                            {    // 非父类
                                break;
                            }
     
                            $options[$cat_id]          = $value;
                            $options[$cat_id]['level'] = $level;
                            $options[$cat_id]['id']    = $cat_id;
                            $options[$cat_id]['name']  = $value['cat_name'];
                            unset($arr[$key]);
     
                            if ($value['has_children'] == 0)
                            {
                                continue;
                            }
                             
                            $last_cat_id  = $cat_id;
     
                            $cat_id_array = array($cat_id);   
      
                            $level_array[$last_cat_id] = ++$level;
                             
                            continue;
                        }    // end if ($level == 0 && $last_cat_id == 0)
     
                        if ($value['parent_id'] == $last_cat_id)    
                        {
                            $options[$cat_id]          = $value;
                            $options[$cat_id]['level'] = $level;
                            $options[$cat_id]['id']    = $cat_id;
                            $options[$cat_id]['name']  = $value['cat_name'];
                            unset($arr[$key]);
     
                            if ($value['has_children'] > 0)
                            {
                                /*
                                 判断是否是有跨级的,如
                                 $array = array(1=>'',
                                                    2=>'',
                                                        3=>'',
                                                            4=>''
                                                        5=>'')
                                $array[3],$array[5]之间,由于在array[4]时,此时为末节点
                                此时会由
                                $last_cat_id = array_pop($cat_id_array);
                                所以会导致 array[3]独立出来,这样就必须加上
                                */ 
                                if (end($cat_id_array) != $last_cat_id)
                                {
                                    $cat_id_array[] = $last_cat_id;
                                }
                                $last_cat_id    = $cat_id;   
                                $cat_id_array[] = $cat_id;
                                $level_array[$last_cat_id] = ++$level;
                            }
                        }    // eof if ($value['parent_id'] == $last_cat_id)
                        elseif ($value['parent_id'] > $last_cat_id)   
                        {
                            break;
                        }    // eof if ($value['parent_id'] == $last_cat_id)
                    }
                                    // end foreach ------------
                    $count = count($cat_id_array);   
                     
                    if ($count > 1)
                    {
                        $last_cat_id = array_pop($cat_id_array);
                    }
                    elseif ($count == 1)
                    {    //由于上一级的原因,会导致 $last_cat_id是子节点
                        if ($last_cat_id != end($cat_id_array))
                        {
                            $last_cat_id = end($cat_id_array);
                        }
                        else
                        {
                            $level = 0;
                            $last_cat_id = 0;
                            $cat_id_array = array();
                            continue;
                        }
                    }
     
                    if ($last_cat_id && isset($level_array[$last_cat_id]))
                    {
                        $level = $level_array[$last_cat_id];
                    }
                    else
                    {
                        $level = 0;
                    }
                }
                            // end while ------------
                //如果数组过大,不采用静态缓存方式
                if (count($options) <= 2000)
                {
                    write_static_cache('cat_option_static', $options);
                }
            }
            else
            {
                $options = $data;
            }
            $cat_options[0] = $options;
        }
        else
        {
            $options = $cat_options[0];
        }
     
        if (!$spec_cat_id)
        {
            return $options;
        }
        else
        {
            if (empty($options[$spec_cat_id]))
            {
                return array();
            }
     
            $spec_cat_id_level = $options[$spec_cat_id]['level'];
     
            foreach ($options AS $key => $value)
            {
                if ($key != $spec_cat_id)
                {
                    unset($options[$key]);
                }
                else
                {
                    break;
                }
            }
     
            $spec_cat_id_array = array();
            foreach ($options AS $key => $value)
            {
                if (($spec_cat_id_level == $value['level'] && $value['cat_id'] != $spec_cat_id) ||
                    ($spec_cat_id_level > $value['level']))
                {
                    break;
                }
                else
                {
                    $spec_cat_id_array[$key] = $value;
                }
            }
            $cat_options[$spec_cat_id] = $spec_cat_id_array;
     
            return $spec_cat_id_array;
        }
    }
    
    /*
    $options 结果为
    Array
    (
        [1] => Array
            (
                [cat_id] => 1
                [cat_name] => 手机类型
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 5
                [sort_order] => 50
                [has_children] => 4
                [goods_num] => 0
                [level] => 0
                [id] => 1
                [name] => 手机类型
                [url] => category.php?id=1
            )
    
        [5] => Array
            (
                [cat_id] => 5
                [cat_name] => 双模手机
                [measure_unit] => 
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 5
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 2
                [level] => 1
                [id] => 5
                [name] => 双模手机
                [url] => category.php?id=5
            )
    
        [2] => Array
            (
                [cat_id] => 2
                [cat_name] => CDMA手机
                [measure_unit] => 
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 0
                [level] => 1
                [id] => 2
                [name] => CDMA手机
                [url] => category.php?id=2
            )
    
        [3] => Array
            (
                [cat_id] => 3
                [cat_name] => GSM手机
                [measure_unit] => 台
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 1
                [grade] => 4
                [sort_order] => 50
                [has_children] => 1
                [goods_num] => 13
                [level] => 1
                [id] => 3
                [name] => GSM手机
                [url] => category.php?id=3
            )
    
        [19] => Array
            (
                [cat_id] => 19
                [cat_name] => 模型机
                [measure_unit] => 
                [parent_id] => 3
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 3
                [sort_order] => 50
                [has_children] => 2
                [goods_num] => 0
                [level] => 2
                [id] => 19
                [name] => 模型机
                [url] => category.php?id=19
            )
    
        [20] => Array
            (
                [cat_id] => 20
                [cat_name] => 金属机
                [measure_unit] => 台
                [parent_id] => 19
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 1
                [goods_num] => 0
                [level] => 3
                [id] => 20
                [name] => 金属机
                [url] => category.php?id=20
            )
    
        [23] => Array
            (
                [cat_id] => 23
                [cat_name] => 诺基亚6300
                [measure_unit] => 
                [parent_id] => 20
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 1
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 2
                [level] => 4
                [id] => 23
                [name] => 诺基亚6300
                [url] => category.php?id=23
            )
    
        [21] => Array
            (
                [cat_id] => 21
                [cat_name] => 塑料机
                [measure_unit] => 台
                [parent_id] => 19
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 1
                [goods_num] => 0
                [level] => 3
                [id] => 21
                [name] => 塑料机
                [url] => category.php?id=21
            )
    
        [22] => Array
            (
                [cat_id] => 22
                [cat_name] => 三星
                [measure_unit] => 
                [parent_id] => 21
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 0
                [level] => 4
                [id] => 22
                [name] => 三星
                [url] => category.php?id=22
            )
    
        [4] => Array
            (
                [cat_id] => 4
                [cat_name] => 3G手机
                [measure_unit] => 
                [parent_id] => 1
                [is_show] => 1
                [show_in_nav] => 1
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 3
                [level] => 1
                [id] => 4
                [name] => 3G手机
                [url] => category.php?id=4
            )
    
        [18] => Array
            (
                [cat_id] => 18
                [cat_name] => 圭亚那
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 1
                [level] => 0
                [id] => 18
                [name] => 圭亚那
                [url] => category.php?id=18
            )
    
        [12] => Array
            (
                [cat_id] => 12
                [cat_name] => 充值卡
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 3
                [goods_num] => 0
                [level] => 0
                [id] => 12
                [name] => 充值卡
                [url] => category.php?id=12
            )
    
        [15] => Array
            (
                [cat_id] => 15
                [cat_name] => 联通手机充值卡
                [measure_unit] => 
                [parent_id] => 12
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 2
                [level] => 1
                [id] => 15
                [name] => 联通手机充值卡
                [url] => category.php?id=15
            )
    
        [13] => Array
            (
                [cat_id] => 13
                [cat_name] => 小灵通/固话充值卡
                [measure_unit] => 
                [parent_id] => 12
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 2
                [level] => 1
                [id] => 13
                [name] => 小灵通/固话充值卡
                [url] => category.php?id=13
            )
    
        [14] => Array
            (
                [cat_id] => 14
                [cat_name] => 移动手机充值卡
                [measure_unit] => 
                [parent_id] => 12
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 2
                [level] => 1
                [id] => 14
                [name] => 移动手机充值卡
                [url] => category.php?id=14
            )
    
        [16] => Array
            (
                [cat_id] => 16
                [cat_name] => 服装
                [measure_unit] => 件
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 8
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 1
                [level] => 0
                [id] => 16
                [name] => 服装
                [url] => category.php?id=16
            )
    
        [6] => Array
            (
                [cat_id] => 6
                [cat_name] => 手机配件
                [measure_unit] => 
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 1
                [grade] => 0
                [sort_order] => 50
                [has_children] => 4
                [goods_num] => 0
                [level] => 0
                [id] => 6
                [name] => 手机配件
                [url] => category.php?id=6
            )
    
        [8] => Array
            (
                [cat_id] => 8
                [cat_name] => 耳机
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 3
                [level] => 1
                [id] => 8
                [name] => 耳机
                [url] => category.php?id=8
            )
    
        [9] => Array
            (
                [cat_id] => 9
                [cat_name] => 电池
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 0
                [level] => 1
                [id] => 9
                [name] => 电池
                [url] => category.php?id=9
            )
    
        [11] => Array
            (
                [cat_id] => 11
                [cat_name] => 读卡器和内存卡
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 2
                [level] => 1
                [id] => 11
                [name] => 读卡器和内存卡
                [url] => category.php?id=11
            )
    
        [7] => Array
            (
                [cat_id] => 7
                [cat_name] => 充电器
                [measure_unit] => 
                [parent_id] => 6
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 0
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 0
                [level] => 1
                [id] => 7
                [name] => 充电器
                [url] => category.php?id=7
            )
    
        [17] => Array
            (
                [cat_id] => 17
                [cat_name] => 食品
                [measure_unit] => 斤
                [parent_id] => 0
                [is_show] => 1
                [show_in_nav] => 0
                [grade] => 5
                [sort_order] => 50
                [has_children] => 0
                [goods_num] => 0
                [level] => 0
                [id] => 17
                [name] => 食品
                [url] => category.php?id=17
            )
    
    )
    
    */
    // 结果如下图
    

      

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  • 原文地址:https://www.cnblogs.com/lin3615/p/5092485.html
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