How to remove Square Bracket from JSON in JavaScript or in php?-CodePudding

I have some JSON data, it is apairing like this now

[
  [
    {
      'key': 'value'
    },
    {
      'key': 'value'
    }
  ]
]

What I want to do, is remove the second square bracket from here like this:

[
  {
    'key': 'value'
  },
  {
    'key': 'value'
  }
]

I've applied some algorithms in both PHP and javascript but it does not work please help me if you know how to solve this

CodePudding user response：

You can use the array_merge() PHP method like this (PHP 7.4 or above)

EDIT: Decode the JSON string using json_decode() php function before.

$flattened_array = array_merge(...$arr);

https://wiki.php.net/rfc/spread_operator_for_array

https://www.php.net/manual/pt_BR/function.array-merge.php

Or simply do this:

$arr = "[
  [
    {
      'key': 'value'
    },
    {
      'key': 'value'
    }
  ]
]" //receives a JSON string;

$flattened_arr = json_decode($arr[0]) //decodes it;