如何在foreach循环内合并数组

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.

Answer 1

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);

Answer 2

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);