Array to Json with multiple same keys

Question

I have this simple array with 2 elements which is being converted into json format:

echo '['.json_encode(array("name" => "FRENCH POLYNESIA", "name" => "POLAND")).']';

The result is: [{"name":"POLAND"}]

In my case I need this result: [{"name": "FRENCH POLYNESIA"},{"name": "POLAND"}] How I can do this ?

You can't create two keys in the same array, the last one will overwrite the previous values. — Spoody
– Spoody, Commented Mar 15, 2018 at 22:23
echo json_encode([array("name" => "FRENCH POLYNESIA"), array("name" => "Poland")]); — Gerrit Luimstra
– Gerrit Luimstra, Commented Mar 15, 2018 at 22:24
even without json_decode you will not be able to initialize array with key duplicated. so change/fix array initialization up to your needs — skyboyer
– skyboyer, Commented Mar 15, 2018 at 22:26

Don't Panic · Accepted Answer · 2018-03-15 22:27:38Z

3

This JSON:

[{"name": "FRENCH POLYNESIA"},{"name": "POLAND"}]

is an array containing two objects. So you need your input array to contain two arrays rather than two key-value pairs.

array(array("name" => "FRENCH POLYNESIA"), array("name" => "POLAND"))

json_encode will convert the inner arrays to objects.

It's already been mentioned in the comments, but your original array format doesn't make sense because you can't have two of the same array key anyway.

answered Mar 15, 2018 at 22:27

Don't Panic

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Spoody · Accepted Answer · 2018-04-04 17:22:48Z

0

You can't create two (or more) identical keys in the same array, the last value will overwrite the previous ones.

This value:

[{"name": "FRENCH POLYNESIA"},{"name": "POLAND"}]

Is decoded to

array (size=2)
  0 => 
    array (size=1)
      'name' => string 'FRENCH POLYNESIA' (length=16)
  1 => 
    array (size=1)
      'name' => string 'POLAND' (length=6)

So to answer your question, your array should look like this

$array = [
    array(
       'name' => 'FRENCH POLYNESIA'
    ),
    array(
       'name' => 'POLAND'
    ),
];

edited Apr 4, 2018 at 17:22

answered Mar 15, 2018 at 22:28

Spoody

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2 Comments

Syscall Over a year ago

"You can't create two keys in the same array." Missing probably a word, right?

Spoody Over a year ago

@Syscall Yes, I fixed it. Thanks!

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