php 笛卡尔积实现sku随机匹配

<?php
$arr = array(array(1,3,4,5),array(3,5,7,9),array(76,6,1,0));
/**
 ** 实现二维数组的笛卡尔积组合
 ** $arr 要进行笛卡尔积的二维数组
 ** $str 最终实现的笛卡尔积组合,可不写
 ** @return array
 **/
function cartesian($arr,$str = array()){
    //去除第一个元素
    $first = array_shift($arr);
    //判断是否是第一次进行拼接
    if(count($str) > 1) {
        foreach ($str as $k => $val) {
            foreach ($first as $key => $value) {
                //最终实现的格式 1,3,76
                //可根据具体需求进行变更
                $str2[] = $val.','.$value;
            }
        }
    }else{
        foreach ($first as $key => $value) {
            //最终实现的格式 1,3,76
            //可根据具体需求进行变更
            $str2[] = $value;
        }
    }

    //递归进行拼接
    if(count($arr) > 0){
        $str2 = cartesian($arr,$str2);
    }
    //返回最终笛卡尔积
    return $str2;
}

$cartesian_product = cartesian($arr);
print_r($cartesian_product);

最终输出格式
 
 
 
 
 
Array
 
(
 
    [0] => 1,3,76
 
    [1] => 1,3,6
 
    [2] => 1,3,1
 
    [3] => 1,3,0
 
    [4] => 1,5,76
 
    [5] => 1,5,6
 
    [6] => 1,5,1
 
    [7] => 1,5,0
 
    [8] => 1,7,76
 
    [9] => 1,7,6
 
    [10] => 1,7,1
 
    [11] => 1,7,0
 
    [12] => 1,9,76
 
    [13] => 1,9,6
 
    [14] => 1,9,1
 
    [15] => 1,9,0
 
    [16] => 3,3,76
 
    [17] => 3,3,6
 
    [18] => 3,3,1
 
    [19] => 3,3,0
 
    [20] => 3,5,76
 
    [21] => 3,5,6
 
    [22] => 3,5,1
 
    [23] => 3,5,0
 
    [24] => 3,7,76
 
    [25] => 3,7,6
 
    [26] => 3,7,1
 
    [27] => 3,7,0
 
    [28] => 3,9,76
 
    [29] => 3,9,6
 
    [30] => 3,9,1
 
    [31] => 3,9,0
 
    [32] => 4,3,76
 
    [33] => 4,3,6
 
    [34] => 4,3,1
 
    [35] => 4,3,0
 
    [36] => 4,5,76
 
    [37] => 4,5,6
 
    [38] => 4,5,1
 
    [39] => 4,5,0
 
    [40] => 4,7,76
 
    [41] => 4,7,6
 
    [42] => 4,7,1
 
    [43] => 4,7,0
 
    [44] => 4,9,76
 
    [45] => 4,9,6
 
    [46] => 4,9,1
 
    [47] => 4,9,0
 
    [48] => 5,3,76
 
    [49] => 5,3,6
 
    [50] => 5,3,1
 
    [51] => 5,3,0
 
    [52] => 5,5,76
 
    [53] => 5,5,6
 
    [54] => 5,5,1
 
    [55] => 5,5,0
 
    [56] => 5,7,76
 
    [57] => 5,7,6
 
    [58] => 5,7,1
 
    [59] => 5,7,0
 
    [60] => 5,9,76
 
    [61] => 5,9,6
 
    [62] => 5,9,1
 
    [63] => 5,9,0
 ）

 

出自https://blog.csdn.net/sqlquan/article/details/88315905