how to remove an array from a multidimensional array?

Question

I have a multidimensional which is a dynamic array like :

Array
(
    [0] => Array
        (
            [key] => delete
            [label] => hi Delete
        )

    [1] => Array
        (
            [key] => edit
            [label] => hi Edit
        )

    [2] => Array
        (
            [key] => update
            [label] => hi update
        )

)

now i want to delete an array below from above multidimensional array:

Array
    (
        [key] => delete
        [label] => hi Delete
    )

finally i want an output like:

Array (

    [0] => Array
        (
            [key] => edit
            [label] => hi Edit
        )

    [1] => Array
        (
            [key] => update
            [label] => hi update
        )

)

For this i have tried, below is my code:

<?php
  $arr1 = array(array("key" => "delete", "label" => "hi Delete"),array("key" => "edit", "label" => "hi Edit"), array("key" => "update", "label" => "hi update"));
   $diff = array_diff_assoc($arr1, array("key" => "delete", "label" => "hi Delete"));
   print_r($diff);
?>

But i get full $arr1 in the output:

Array
(
    [0] => Array
        (
            [key] => delete
            [label] => hi Delete
        )

    [1] => Array
        (
            [key] => edit
            [label] => hi Edit
        )

    [2] => Array
        (
            [key] => update
            [label] => hi update
        )

)

how can i do this please help me

or check this http://stackoverflow.com/questions/369602/delete-an-element-from-an-array — Amit Kumar, Nov 03 '16 at 12:17
Take a look at this: http://php.net/manual/en/function.array-diff-assoc.php array_diff is working another way than you expect. — Twinfriends, Nov 03 '16 at 12:18
You are using arrray_diff_assoc($arr1, array("key" => "delete", "label" => "hi Delete")) here $arr1 is multidimension and next one is single dimension that's why you are getting same — Amit Kumar, Nov 03 '16 at 12:20
then you have one option left, loop through array and test for the key upon finding unset that key — Amit Kumar, Nov 03 '16 at 12:23

score 3 · Accepted Answer · answered Nov 03 '16 at 12:29

3

Use array_filter with callback as

$arr1 = array_filter($arr1, function ($var) {
    return $var['key'] != 'delete';
});
print_r($arr1);

answered Nov 03 '16 at 12:29

Saty

22,443
7
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but the order of index has not arranged properly, it delete the 0th index and starts array with 1index – lazyCoder Nov 03 '16 at 12:36
OP mentioned 1,000's of records and seems concerned about performance, using php's array_ functions are much slower than interating through the collection. – Stuart Nov 03 '16 at 12:36
2

@BunkerBoy then $arr1 = array_values($arr1); – L. Herrera Nov 03 '16 at 12:38

Stuart · Answer 2 · 2016-11-03T12:38:43.650

1

You should loop through the array and test for the key you want to remove, like so: (written blind so youll need to test it!)

<?php
foreach ($arr1 as $thisArrIndex=>$subArray)
{
    if ( $subArray['key'] == "delete" )
    {
        unset($arr1[$thisArrIndex]);
    }
}
?>

Suggested edit was to break out of the loop after finding the key. It seems OP may have multiple keys like this (in the multiple sub arrays) and so i chose not to break out of the loop here.

edited Nov 03 '16 at 12:38

answered Nov 03 '16 at 12:19

Stuart

6,630
2
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i can not use loop @Stuart , is there any function by which i can do this? – lazyCoder Nov 03 '16 at 12:23
Why can you not use a foreach...? – Stuart Nov 03 '16 at 12:26
You could loop through 1,000,000 records using foreach in ~0.3 seconds... -- The answer by @Saty is good but performance is **twice as slow as using foreach**.... – Stuart Nov 03 '16 at 12:34

how to remove an array from a multidimensional array?

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