如何从Array_Chunck中删除数组键？

Question

I have array_chunk a set of 10 keys within each array that loops through. I want to remove the key [10]=> from each array that is looped so I will have 9 keys remaining. What I have so far.

    $page = array( "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s");

$number_of_pages_to_copy = 5;

$x = 1;

    while($x <= $number_of_pages_to_copy) { 


      $sum = array_chunk($page, 11);
      unset($sum['10']);
      print_r($sum);

    $x++;
    }

Current output:

Array ( [0] => Array ( [1] => "a" [2] => "b" [3] => "c" [4] => "d" [5] => "e" [6] => "f" [7] => "g" [8] => "h" [9] => "i" [10]=> "j" )

[1]=> Array ( [1] => "a" [2] => "b" [3] => "c" [4] => "d" [5] => "e" [6] => "f" [7] => "g" [8] => "h" [9] => "i" [10]=> "j" )

Desired output:

Array ( [0] => Array ( [1] => "a" [2] => "b" [3] => "c" [4] => "d" [5] => "e" [6] => "f" [7] => "g" [8] => "h" [9] => "i" )

[1] => Array ( [0] => Array ( [1] => "a" [2] => "b" [3] => "c" [4] => "d" [5] => "e" [6] => "f" [7] => "g" [8] => "h" [9] => "i" )

Nothing is happening, The unset seems not to be working.

Answer 1

Your $sum is an array of array, so you have to use another index or foreach.

  array_slice($sum[0],0,10);

or

foreach($sum as &$v)
{
  unset($v[10]);
}

for you unset the last index of the array, so you neednot to reindex the array, if not use array_values after unset.

Here is a demo:

<?php
$page = array( "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s");
$arrays= array_chunk($page, 11);
foreach($arrays as &$array)
{
    unset($array[10]);
}
print_r($arrays);

output:

ei@localhost:~$ php test.php
Array
(
    [0] => Array
        (
            [0] => a
            [1] => b
            [2] => c
            [3] => d
            [4] => e
            [5] => f
            [6] => g
            [7] => h
            [8] => i
            [9] => j
        )

    [1] => Array
        (
            [0] => l
            [1] => m
            [2] => n
            [3] => o
            [4] => p
            [5] => q
            [6] => r
            [7] => s
        )

)

or

<?php
$page = array( "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s");
$arrays= array_chunk($page, 11);
$arrays = array_map(function($v){return array_slice($v, 0, 10);}, $arrays);
print_r($arrays);

and this will get the same output.