Question

我有一个有趣的问题。我有一个像这样的多维数组：

Array
(
    [0] => Array
        (
            [0] => 4
            [1] => 4
            [2] => 4
            [3] => 4
            [4] => 3
            [5] => 3
            [6] => 3
            [7] => 2
        )
    [1] => Array
        (
            [0] => 4
            [1] => 4
            [2] => 3
            [3] => 3
            [4] => 2
        )
)

我希望能够使用array_slice从每个子数组中删除一定比例的行。

根据此处的上一篇文章（array_slice in multidimensional array?），我可以轻松地删除固定数量的行。但是说我想删除每个子数组的70％，该子数组具有不同数量的行，我有点卡住了。

Answer 1

类似....

<?php

$items = array ( 
        array ( 1, 7, 23, 32, 64, 77 ), 
        array ( 23, 32, 64, 77 ), 
        array ( 1, 5, 7, 13, 16, 23, 32, 64, 77 )
        );

// (?), remove, or keep

$type = 'remove';

// percentage (%)

$percent = 60;

$format = $type == 'remove' ? ( 100 - $percent ) : $percent;

foreach ( $items AS $array => $values )
{
    $max = round ( ( ( count ( $values ) * $format ) / 100 ) );

    $items[$array] = array_slice ( $values, 0, $max );
}

print_r ( $items );

?>

array_slice多维数组的百分比

1 个答案: