customize array in php

Question

I have an array like this:

 Array ( [0] => Array 
             ([category_name] => Operating System
              [sub_category_name] => Windows 8) 
         [1] => Array 
             ([category_name] => Operating System
              [sub_category_name] => Linux)
         [2] => Array 
             ([category_name] => Mobile
              [sub_category_name] => Nokia))

I would like to customize it like this:

Array('Operating System' => 'Windows 8', 'Operating System' => 'Linux', 'Mobile' => 'Nokia')

Thanks in advance. Any help or suggestion would be a great help...

@ICanHasCheezburger how i can write 2 foreach...could you please give me more details.. so that i can try.. — Mohammed Sufian, Mar 20 '14 at 10:29
@Muhammad :| Please have a look [here.](http://stackoverflow.com/questions/6413589/php-foreach-with-multidimensional-array) This is basic and can easily be found with a little search. — AyB, Mar 20 '14 at 10:31
The sample ARRAY you posted cannot be achieve because you have Operating System as KEY twice and this will overwrite values. If you want to just echo than you can surely do a Foreach or while, but if you want the ARRAY as variable than it is not possible. — Sumit Gupta, Mar 20 '14 at 11:01

nanobash · Answer 1 · 2014-03-20T11:12:20.063

2

$n = array();
$i = 0;

array_walk($arr, function($subArr) {
    global $n;
    global $i;
    $n[$subArr['category_name'] . $i] = $subArr['sub_category_name'];
    $i++;
});

var_dump($n); // array(3) { ["Operating System0"]=> string(9) "Windows 8" ["Operating System1"]=> string(5) "Linux" ["Mobile2"]=> string(5) "Nokia" }

NOTE: As OP updated question, I updated answer too, though in the same array the same keys are not permitted, so I added counter at the end of the key in the new array.

DEMO

edited Mar 20 '14 at 11:12

answered Mar 20 '14 at 10:39

nanobash

5,419
7
38
56

i am really very sorry :( .. i have updated the required output in the question... – Mohammed Sufian Mar 20 '14 at 10:44
you can't have duplicates key in array – ponciste Mar 20 '14 at 10:45
what he want is different, look output in question – Farnabaz Mar 20 '14 at 10:52
@crypticous sir thank you very much.. for your important time.. but you demo `$arr` is deffirent from my question array... – Mohammed Sufian Mar 20 '14 at 11:04
@Muhammad Because of numbers at the end of the keys yes ? Sure it is because in the array same keys aren't permitted, in this case your information will be omitted ! – nanobash Mar 20 '14 at 11:05
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/50121/discussion-between-crypticous-and-muhammad) – nanobash Mar 20 '14 at 11:10
1

@ToKeN Sir .. thank you very much sir.. for your important time.. :) – Mohammed Sufian Mar 20 '14 at 13:05

Farnabaz · Accepted Answer · 2014-03-20T11:07:20.170

1

this may help

$result = array();
foreach($firstArray as $row) {
    $result[$row['category_name']] = $row['sub_category_name'];
}

if you want to merge duplicate keys you can write like this

$result = array();
foreach($firstArray as $row) {
    if(isset($result[$row['category_name']])) {
        if(!is_array($result[$row['category_name']])) {
            $tmp = array();
            $tmp[] = $result[$row['category_name']];
            $result[$row['category_name']] = $tmp;
        }
        $result[$row['category_name']][] = $row['sub_category_name'];
    } else 
    $result[$row['category_name']] = $row['sub_category_name'];
}

edited Mar 20 '14 at 11:07

answered Mar 20 '14 at 10:33

Farnabaz

4,030
1
22
42

Sir thanks,,, but your code giving me.. Array ( [0] => Operating System [1] => Windows 8 [2] => Operating System ) and my requirement is different.. – Mohammed Sufian Mar 20 '14 at 10:39
you want remove duplicate elements? @Muhammad – Farnabaz Mar 20 '14 at 10:40
no.. i want the category and sub_category should come as key and values – Mohammed Sufian Mar 20 '14 at 10:40
check out my answer, it should do what you are looking for – ponciste Mar 20 '14 at 10:42
i am really very sorry :( .. i have updated the required output in the question... – Mohammed Sufian Mar 20 '14 at 10:45
@Muhammad like this? `Array ( Operating System => Windows 8 ...)` ? – Farnabaz Mar 20 '14 at 10:45
@Farnabaz thank you very much sir..this is also fits in my requirement.. :) – Mohammed Sufian Mar 20 '14 at 13:03

score 1 · Answer 3 · answered Mar 20 '14 at 11:57

PHP does not allow duplicate keys for same array.
If you want to use same keys for multiple values then you should use multidimensional array as mentioned in below example.

As per your above code below is your array 
$array = array("0" => array("category_name" => "Operating System", "sub_category_name" => "Windows 8"),
    "1" => array("category_name" => "Operating System", "sub_category_name" => "Linux"),
    "2" => array("category_name" => "Mobile", "sub_category_name" => "Nokia"));

you can merge the array and for same key use multidimensional array

$new_array = array();
foreach ($array as $arr) {

    $arrmerge = array($arr['category_name'] => $arr['sub_category_name']);
    if (array_key_exists($arr['category_name'], $new_array)) {
        $arrmerge[$arr['category_name']] = array($new_array[$arr['category_name']], $arr['sub_category_name']);
    }

    $new_array = array_merge($new_array, $arrmerge);
}
print_r($new_array);

I hope this will help you.

customize array in php

3 Answers3