Split an array into two identical arrays by key value

Question

I have an array that looks like this:

MyArray (
    [0] => Array (
                            [board_id] => 1047999
                            [added_date] => 2013-02-28 11:14:02
                            [type] => 4
                           )
    [1] => Array (
                           [board_id] => 1047999
                           [added_date] => 2013-02-28 11:14:02
                           [type] => 1
                          )
    [2] => Array (
                          [board_id] => 1047999
                          [added_date] => 2013-02-28 11:14:02
                          [type] => 4
                          )
    [3] => Array (
                          [board_id] => 1047999
                          [added_date] => 2013-02-28 11:14:02
                          [type] => 1
                          )
)

How can I split this array by type and keep the exact same array structure? I.e. I would have MyArrayT4 with two subarrays, and MyArrayT1 with two subarrays?

TIA!

the last entry, is there [3] => Array(missing??

michi
– michi

2013-03-03 21:15:46 +00:00
Commented Mar 3, 2013 at 21:15 — michi
– michi, Commented Mar 3, 2013 at 21:15

silly · Accepted Answer · 2013-03-04 06:31:29Z

2

use array_filter like this EDIT use array_values to reset

$filtering = function($type) use($your_array) {
    $filtered = array_filter($your_array, function($r) use($type) {
        return $r['type'] == $type;
    });

    return array_values($filtered);
};


$array_1 = $filtering->__invoke('4');
$array_2 = $filtering->__invoke('1');

edited Mar 4, 2013 at 6:31

answered Mar 3, 2013 at 21:16

silly

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5 Comments

Yoshi Over a year ago

Wouldn't it be better to pass the input array as a parameter instead of use? Also the __invoke is unnecessary $filtering() is enough.

Austin Mullins Over a year ago

I had no idea you could do javascript-style var = function() {} instructions in PHP. That's awesome.

silly Over a year ago

@AustinMullins Closures are supported since PHP 5.3 ... yea... you can pass the array..

Phil Over a year ago

Thanks silly. You may want to add in your answer that one should use array_values to reset the array numbering, otherwise loops can get messed up!

Steward Godwin Jornsen Over a year ago

Wanted to post a response, saw this and hit pause. Great one.

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