How to replace value inside an array?

Question

I have an array as shown below.

array (size=2)
    '1S1' =>
      array (size=8)
        'order_id' => int 0
        'item_id' => int 1
        'special_desc' => string 'Special XXX' (length=11)
        'qty' => int 2
        'price' => int 50
        'amount' => int 0
        'created_at' => int 1376580193
        'updated_at' => int 1376580193
    '1S2' =>
      array (size=8)
        'order_id' => int 0
        'item_id' => int 2
        'special_desc' => string 'Special YYY' (length=11)
        'qty' => int 3
        'price' => int 150
        'amount' => int 0
        'created_at' => int 1376580193
        'updated_at' => int 1376580193

If I wanted to replace "order_id" of both elements of this array to a new value before saving to the database, what array function or technique can I use?

Thanks.

Is the array dynamic in which, you wouldn't know the keys to the first level? — Hydra IO
– Hydra IO, Commented Aug 15, 2013 at 16:15
What's wrong with looping through your array and modifing the variables directly? — Hieu Le
– Hieu Le, Commented Aug 15, 2013 at 16:17
just loop through your array eg. with foreach and modify your value — sinaneker
– sinaneker, Commented Aug 15, 2013 at 16:21
Sorry, I thought image is easy to read, I didn't know people copies the code somewhere to help fixing my problem. Thanks Cris for image to text conversion. — Artisan
– Artisan, Commented Aug 15, 2013 at 18:12

Ascherer · Accepted Answer · 2013-08-15 18:12:22Z

2

Take a look at array_walk:

$array = array_walk( $array, function( $subArray ) {
    $subArray[ 'order_id' ] = 'someNewValue';
} );

A simple foreach could work too.

// Noting the '&' by reference call
foreach( $array as &$subArray ) {
    $subArray[ 'order_id' ] = 'someNewValue';
}
// Or
foreach( $array as $key => $value ) {
   $array[ $key  ][ 'order_id' ] = 'someNewValue';
}

edited Aug 15, 2013 at 18:12

answered Aug 15, 2013 at 16:20

Ascherer

8,1213 gold badges45 silver badges60 bronze badges

Sign up to request clarification or add additional context in comments.

6 Comments

Ry- Over a year ago

The correct function to use in this situation is array_walk, not array_map (your function doesn’t return anything).

Artisan Over a year ago

I use for each but the values did not change. $cartItems = array_values($cartItems); foreach($cartItems as $cartItem) { $cartItem['order_id'] = 50; } var_dump($cartItems);

Ascherer Over a year ago

@Kongthap you need to specify that you are editing it by reference. Thats what the & is for in front of my $subArray is. Change your foreach to foreach( $cartItems as &$cartItem )

Ascherer Over a year ago

@Kongthap I added another way to do a foreach for you, that doesnt use by reference

Artisan Over a year ago

Using $array['1S1']['order_id'] = $new_value is working, but I have to loop through the whole array at runtime.

|

j08691 · Accepted Answer · 2013-08-15 16:18:32Z

0

$array_name['1S1']['order_id'] = some value;
$array_name['1S2']['order_id'] = some value;

answered Aug 15, 2013 at 16:18

j08691

208k33 gold badges269 silver badges281 bronze badges

3 Comments

Hydra IO Over a year ago

This is why I specificly asked the OP if the first level array keys were dynamic in which case this won't work :p You would have to loop

Artisan Over a year ago

Sorry, looping through the whole array is better for my case, but I still cannot get value changed using foreach.

Artisan Over a year ago

Your answer is working for changing to the new value but I don't understand why foreach ($entireArray as $eachArray) { $eachArray['order_id'] = $new_value; } is not working...

Collectives™ on Stack Overflow

How to replace value inside an array?

2 Answers 2

6 Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

6 Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related