Question

我有一个这样的数组：

$arrayToFill=['a','b','c','d','e','f','g','h','k','l','m','n','o','p','r','u','w','x','y','z'];

所以有20个元素，我希望数组$batchArray在迭代后看起来像这样：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => a
                    [1] => b
                    [2] => c
                    [3] => d
                    [4] => e
                )

            [1] => Array
                (
                    [0] => f
                    [1] => g
                    [2] => h
                    [3] => k
                    [4] => l
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [0] => m
                    [1] => n
                    [2] => o
                    [3] => p
                    [4] => r
                )

            [1] => Array
                (
                    [0] => u
                    [1] => w
                    [2] => x
                    [3] => y
                    [4] => z
                )

        )

)

所以在第六，第十一等元素上制作了新的子阵列，在该子阵列的第二个上，制作了更大的阵列。以下是我尝试过的方法以及到目前为止我所做的：

$a=0;
$i=0;
$arrayToFill=['a','b','c','d','e','f','g','h','k','l','m','n','o','p','r','u','w','x','y','z'];
$batchArray=[];
$batchArray[$a]=[];
$batchArray[$a][$i]=[];

if($i==0){
    $currentNumber = ($i+1)*5;
}else{
    $currentNumber = 5;
}

$currentNumberOfBathes=count($batchArray[$a])+1;
$currentNumberBatch = 2;

foreach($arrayToFill as $array){
    $numberOfElements=count($batchArray[$a][$i]);
    $currentNumberOfBathes=count($batchArray[$a])+1;
    if($numberOfElements>$currentNumber && $numberOfElements<$currentNumber+2){
        echo 'desilo se';
        echo $i;
        $i++;
        $batchArray[$a][$i]=[];
    }

    array_push($batchArray[$a][$i],$array);

}

所以这就是我得到的：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => a
                    [1] => b
                    [2] => c
                    [3] => d
                    [4] => e
                    [5] => f
                )

            [1] => Array
                (
                    [0] => g
                    [1] => h
                    [2] => k
                    [3] => l
                    [4] => m
                    [5] => n
                )

            [2] => Array
                (
                    [0] => o
                    [1] => p
                    [2] => r
                    [3] => u
                    [4] => w
                    [5] => x
                )

            [3] => Array
                (
                    [0] => y
                    [1] => z
                )

        )

)

首先，在某处丢失的信件很少。当我试图限制这个包含5个字母的子数组时，将其索引增加到第三个，如下所示：

foreach($arrayToFill as $array){

    $numberOfElements=count($batchArray[$a][$i]);
    $currentNumberOfBathes=count($batchArray[$a])+1;
    if($numberOfElements>$currentNumber && $numberOfElements<$currentNumber+2){
        $i++;
        $batchArray[$a][$i]=[];
    }
    if($currentNumberOfBathes>$currentNumberBatch && $currentNumberOfBathes<$currentNumberBatch+2){
        $a++;
        $batchArray[$a]=[];
    }
    array_push($batchArray[$a][$i],$array);

}

我收到此输出并发出警告：

Warning: array_push() expects parameter 1 to be array, null given
Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => a
                    [1] => b
                    [2] => c
                    [3] => d
                    [4] => e
                    [5] => f
                )

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

        )

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

)

那么，这里发生了什么以及为什么更大的谜团。请帮忙

Answer 1

只需使用array_chunk()几次即可大大简化此操作。第一次将其拆分为数组数组，后者每个最多包含5个元素。然后第二次将分成两个元素的数组。

比说它更容易看到：

print_r(array_chunk(array_chunk($arrayToFill, 5), 2));

结果：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => a
                    [1] => b
                    [2] => c
                    [3] => d
                    [4] => e
                )

            [1] => Array
                (
                    [0] => f
                    [1] => g
                    [2] => h
                    [3] => k
                    [4] => l
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [0] => m
                    [1] => n
                    [2] => o
                    [3] => p
                    [4] => r
                )

            [1] => Array
                (
                    [0] => u
                    [1] => w
                    [2] => x
                    [3] => y
                    [4] => z
                )

        )

)

如何将数组的每个第n个元素排序成不同的子数组？

1 个答案: