求商品SKU的所有组合（笛卡尔积）-js和php实现版

JavaScript代码实现

/**
 * 组合多个数组
 * @param  {...Array} arrays 
 * @returns 
 */
function combine(...arrays) {
  let list = [];

  let helper = function (index, prev) {

    // 当前数组
    let array = arrays[index];

    // 是否为最后一个数组
    let is_last = arrays.length - 1 == index;

    for (let item of array) {

      let current = prev.concat(item);
      if (is_last) {
        list.push(current);
      } else {
        helper(index + 1, current);
      }
    }
  };

  helper(0, []);

  return list;
}




let names = ['iPhone X', 'iPhone XS'];

let colors = ['黑色', '白色'];

let storages = ['64g', '256g'];


console.log(combine(names, colors, storages));

输出

[
  [ 'iPhone X', '黑色', '64g' ],
  [ 'iPhone X', '黑色', '256g' ],
  [ 'iPhone X', '白色', '64g' ],
  [ 'iPhone X', '白色', '256g' ],
  [ 'iPhone XS', '黑色', '64g' ],
  [ 'iPhone XS', '黑色', '256g' ],
  [ 'iPhone XS', '白色', '64g' ],
  [ 'iPhone XS', '白色', '256g' ]
]

PHP实现版