PHP数组：填充一系列重复项

Question

大图：我需要处理数据以找出最符合条件的数据组合（包括最多4个重复）。

从基本数组（1,2,3）和$ repeat_max = 4变量开始，我想以编程方式创建这样的数组，因为数组值将是动态的。 请原谅任何较小的语法错误，这只是一个一般概念。 请告诉我这是否是最糟糕的主意。 如何遍历$ data并创建$ indiv？

$data = array(1,2,3);

$indiv[0] => array ([0] => array([0] = 1),
                    [1] => array([0] = 1, [1] = 1),
                    [2] => array([0] = 1, [1] = 1, [2] = 1),
                    [3] => array([0] = 1, [1] = 1, [2] = 1, [3] = 1)),
$indiv[1] => array ([0] => array([0] = 2),
                    [1] => array([0] = 2, [1] = 2),
                    [2] => array([0] = 2, [1] = 2, [2] = 2),
                    [3] => array([0] = 2, [1] = 2, [2] = 2, [3] = 2)),
$indiv[2] => array ([0] => array([0] = 3),
                    [1] => array([0] = 3, [1] = 3),
                    [2] => array([0] = 3, [1] = 3, [2] = 3),
                    [3] => array([0] = 3, [1] = 3, [2] = 3, [3] = 3))

Answer 1

array_fill应该可以解决问题：

$indiv = array();
foreach ($data as $val) {
  $tmp = array();
  for ($i = 0; $i < $repeat_max; $i++) $tmp[$i] = array_fill(0, $i + 1, $val);
  $indiv[] = $tmp;
}

$data = [ 1, 2 ]和$repeat_max = 3它看起来像这样：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => 1
                )

            [1] => Array
                (
                    [0] => 1
                    [1] => 1
                )

            [2] => Array
                (
                    [0] => 1
                    [1] => 1
                    [2] => 1
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [0] => 2
                )

            [1] => Array
                (
                    [0] => 2
                    [1] => 2
                )

            [2] => Array
                (
                    [0] => 2
                    [1] => 2
                    [2] => 2
                )

        )

)