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

Take a look at this: php.net/manual/en/function.array-diff-assoc.php array_diff is working another way than you expect. — Twinfriends
– Twinfriends, Commented Nov 3, 2016 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
– Amit Kumar, Commented Nov 3, 2016 at 12:20

Saty · Accepted Answer · 2016-11-03 12:29:40Z

3

Use array_filter with callback as

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

answered Nov 3, 2016 at 12:29

Saty

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3 Comments

lazyCoder Over a year ago

but the order of index has not arranged properly, it delete the 0th index and starts array with 1index

Stuart Over a year ago

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.

L. Herrera Over a year ago

@BunkerBoy then $arr1 = array_values($arr1);

Stuart · Accepted Answer · 2016-11-03 12:38:43Z

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 3, 2016 at 12:38

answered Nov 3, 2016 at 12:19

Stuart

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3 Comments

lazyCoder Over a year ago

i can not use loop @Stuart , is there any function by which i can do this?

Stuart Over a year ago

Why can you not use a foreach...?

Stuart Over a year ago

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....

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