CODEWITHSUNDEEP
phpmultidimensional-arrayreindex
Leo Chan
Leo Chan

Reputation: 4427

How to re-index all subarray elements of a multidimensional array?

The question is how to reset key e.g. for an array:

Array ( 
    [1_Name] => Array ( 
        [1] => leo 
        [4] => NULL 
    ) 
    [1_Phone] => Array ( 
        [1] => 12345 
        [4] => 434324
    )  
)

reset to :

Array ( 
    [1_Name] => Array ( 
        [0] => leo 
        [1] => NULL 
    ) 
    [1_Phone] => Array ( 
        [0] => 12345 
        [1] => 434324
    ) 
)

Upvotes: 167

Views: 304467

Answers (6)

deceze
deceze

Reputation: 522626

To reset the keys of all arrays in an array:

$arr = array_map('array_values', $arr);

In case you just want to reset first-level array keys, use array_values() without array_map.

Upvotes: 349

Skit
Skit

Reputation: 61

$result = ['5' => 'cherry', '7' => 'apple'];
array_multisort($result, SORT_ASC);
print_r($result);

Array ( [0] => apple [1] => cherry )

//...
array_multisort($result, SORT_DESC);
//...

Array ( [0] => cherry [1] => apple )

Upvotes: 6

William Espindola
William Espindola

Reputation: 29

PHP native function exists for this. See http://php.net/manual/en/function.reset.php

Simply do this: mixed reset ( array &$array )

Upvotes: -7

Mahdi
Mahdi

Reputation: 9427

Here you can see the difference between the way that deceze offered comparing to the simple array_values approach:

The Array:

$array['a'][0] = array('x' => 1, 'y' => 2, 'z' => 3);
$array['a'][5] = array('x' => 4, 'y' => 5, 'z' => 6);

$array['b'][1] = array('x' => 7, 'y' => 8, 'z' => 9);
$array['b'][7] = array('x' => 10, 'y' => 11, 'z' => 12);

In deceze way, here is your output:

$array = array_map('array_values', $array);
print_r($array);

/* Output */

Array
(
    [a] => Array
        (
            [0] => Array
                (
                    [x] => 1
                    [y] => 2
                    [z] => 3
                )
            [1] => Array
                (
                    [x] => 4
                    [y] => 5
                    [z] => 6
                )
        )
    [b] => Array
        (
            [0] => Array
                (
                    [x] => 7
                    [y] => 8
                    [z] => 9
                )

            [1] => Array
                (
                    [x] => 10
                    [y] => 11
                    [z] => 12
                )
        )
)

And here is your output if you only use array_values function:

$array = array_values($array);
print_r($array);

/* Output */

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [x] => 1
                    [y] => 2
                    [z] => 3
                )
            [5] => Array
                (
                    [x] => 4
                    [y] => 5
                    [z] => 6
                )
        )
    [1] => Array
        (
            [1] => Array
                (
                    [x] => 7
                    [y] => 8
                    [z] => 9
                )
            [7] => Array
                (
                    [x] => 10
                    [y] => 11
                    [z] => 12
                )
        )
)

Upvotes: 11

user1249679
user1249679

Reputation: 

$array[9] = 'Apple';
$array[12] = 'Orange';
$array[5] = 'Peach';

$array = array_values($array);

through this function you can reset your array

$array[0] = 'Apple';
$array[1] = 'Orange';
$array[2] = 'Peach';

Upvotes: 244

Andreas Wong
Andreas Wong

Reputation: 60594

Use array_values to reset keys

foreach($input as &$val) {
   $val = array_values($val);
}

http://php.net/array_values

Upvotes: 26

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