How to combine array inside foreach loop

Question

I have this nested array

$lists = [
  [
   {"id": 1, "name": one},
   {"id": 2, "name": two},
   {"id": 3, "name": three},
  ],
  [
   {"id": 4, "name": four},
   {"id": 5, "name": five},
   {"id": 6, "name": six},
  ]
]

What should i do to make this array into one like this.

[
   {"id": 1, "name": one},
   {"id": 2, "name": two},
   {"id": 3, "name": three},
   {"id": 4, "name": four},
   {"id": 5, "name": five},
   {"id": 6, "name": six},
]

I tried array_merge using this code

$numbers =[];
foreach ($lists as $list) {
    $numbers = array_merge($numbers, $list);
}

But it didn't work. It says that argument #2 is not an array.

Where's the index numbers you're referring to? I can't see it in the arrays you've posted? You should also clarify what "didn't work" means. Wrong result? Errors? — M. Eriksson
– M. Eriksson, Commented Dec 13, 2018 at 7:18
the numbers index consist the array in the first code. Sorry forgot to add — MONSTEEEER
– MONSTEEEER, Commented Dec 13, 2018 at 7:28
json_encode(array_merge(...json_decode($json, true)))- sandbox.onlinephpfunctions.com/code/… — splash58
– splash58, Commented Dec 13, 2018 at 7:40
question edited, please see and mybe it can help you identify my problem — MONSTEEEER
– MONSTEEEER, Commented Dec 13, 2018 at 7:48

Utpaul · Accepted Answer · 2018-12-17 04:20:56Z

3

You can try this way. I hope it will be helpful

$lists =array(
 array(
    array("id"=> 1, "name"=> "one"),
    array("id"=> 2, "name"=> "two"),
    array("id"=> 3, "name"=> "three")
  ),
  array(
    array("id"=> 4, "name"=> "four"),
    array("id"=> 5, "name"=> "five"),
    array("id"=> 6, "name"=> "six")

  )
);

    $numbers =array();
foreach ($lists as $list) {

   foreach ($list as $c) {
    array_push($numbers,$c);
   }
}

echo "<pre>";
print_r($numbers);

edited Dec 17, 2018 at 4:20

Utpaul

2,1172 gold badges13 silver badges27 bronze badges

answered Dec 13, 2018 at 8:22

Md. Fazlur Rahman

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Comments

Nigel Ren · Accepted Answer · 2018-12-13 07:33:29Z

1

There are a few issues. The initial data is invalid JSON, but this is an aside, I've fixed it in the data below.

You are looping over an empty array $lists which you create just before the loop. Here I've created this from the JSON data and removed the array initialisation. Lastly you where using $list['numbers'] where numbers isn't defined anywhere ...

$json = '[
  [
   {"id": 1, "name": "one"},
   {"id": 2, "name": "two"},
   {"id": 3, "name": "three"}
  ],
  [
   {"id": 4, "name": "four"},
   {"id": 5, "name": "five"},
   {"id": 6, "name": "six"}
  ]
]';

$lists = json_decode($json, true);
$numbers =[];
foreach ($lists as $list) {
    $numbers = array_merge($numbers, $list);
}
print_r($numbers);

Update:

As a guess to what you've added in the comments to the question, try...

$numbers =[];
foreach ($lists['numbers'] as $list) {
    $numbers = array_merge($numbers, $list);
}
print_r($numbers);

edited Dec 13, 2018 at 7:33

answered Dec 13, 2018 at 7:20

Nigel Ren

57.3k11 gold badges49 silver badges59 bronze badges

6 Comments

MONSTEEEER Over a year ago

When I used array_merge, it says that the argument #2 is not an array.

Nigel Ren Over a year ago

How do you convert your data (I've used json_decode()) to the data you want to use. I can't test it if I don't have your original data.

Nigel Ren Over a year ago

I've added a new piece of code, this may be what your asking for but it isn't clear.

MONSTEEEER Over a year ago

question edited, please see and mybe it can help you identify my problem

Mostafa Abedi Over a year ago

@MONSTER The $lists is not a corrcet php array, meybe it's an output from APi or dumping something in your controller. please be sure what is $lists type

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