remove duplicate values from multidimensional array

Question

Below is the result and I want to remove duplicate from the array

I tried using this code: $login_data1['items'] = array_values(array_map("unserialize", array_unique(array_map("serialize", $login_data1['items']))));

{
    "items": [
        {
            "id": "2",
            "tags": [
                {
                    "name": "Microsoft"
                }
            ],
            "type": "manual",
        },
        {
            "id": "1",
            "tags": [
                {
                    "name": "Snow Leopard"
                }
            ],
            "type": "faq"
        },
        {
            "id": "2",
            "tags": [
                {
                    "name": "Microsoft"
                }
            ],
           "type": "manual"
        }
    ],
}

I tried using $login_data1['items'] = array_unique($login_data1['items'] ,SORT_REGULAR); but this adds serial numbers at the each json response

$input = array_map("unserialize", array_unique(array_map("serialize", $input))); try this by putting your variables — Death-is-the-real-truth
– Death-is-the-real-truth, Commented Jul 3, 2015 at 13:37

Narendrasingh Sisodia · Accepted Answer · 2015-07-03 17:53:20Z

2

Try as using array_unique

$json = '{
"items": [
    {
        "id": "2",
        "tags": [
            {
                "name": "Microsoft"
            }
        ],
        "type": "manual"
    },
    {
        "id": "1",
        "tags": [
            {
                "name": "Snow Leopard"
            }
        ],
        "type": "faq"
    },
    {
        "id": "2",
        "tags": [
            {
                "name": "Microsoft"
            }
        ],
       "type": "manual"
    }
]
}';

foreach(json_decode($json, true) as $key => $value){
    $input = array_unique($value,SORT_REGULAR);
}

If its an array then simply use

array_unique($login_data['items'],SORT_REGULAR);

Fiddle

edited Jul 3, 2015 at 17:53

answered Jul 3, 2015 at 13:51

Narendrasingh Sisodia

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2 Comments

user3886556 Over a year ago

when I try $json = $login_data1['items']; and your code, I am getting "Warning: json_decode() expects parameter 1 to be string, array given"

Narendrasingh Sisodia Over a year ago

What is $login_data1['items'] is it an array or string

FedericoFiorini · Accepted Answer · 2015-07-03 14:22:55Z

array_unique works perfectly if you pass a multidimensional array.

$login_data1['items'] = array_unique($login_data1['items'], SORT_REGULAR);

It doesn't work with your json because it's an array of object. Infact:

  $array = json_decode($json);
  var_dump($array);

returns:

    object(stdClass)#1 (1) {
  ["items"]=>
  array(3) {
    [0]=>
    object(stdClass)#2 (3) {
      ["id"]=>
      string(1) "2"
      ["tags"]=>
      array(1) {
        [0]=>
        object(stdClass)#3 (1) {
          ["name"]=>
          string(9) "Microsoft"
        }
      }
      ["type"]=>
      string(6) "manual"
    }
    [1]=>
    object(stdClass)#4 (3) {
      ["id"]=>
      string(1) "1"
      ["tags"]=>
      array(1) {
        [0]=>
        object(stdClass)#5 (1) {
          ["name"]=>
          string(12) "Snow Leopard"
        }
      }
      ["type"]=>
      string(3) "faq"
    }
    [2]=>
    object(stdClass)#6 (3) {
      ["id"]=>
      string(1) "2"
      ["tags"]=>
      array(1) {
        [0]=>
        object(stdClass)#7 (1) {
          ["name"]=>
          string(9) "Microsoft"
        }
      }
      ["type"]=>
      string(6) "manual"
    }
  }
}

Your json should look like this:

{
"items": [
    {
        "id": "2",
        "tags": {
            "name": "Microsoft"
        },
        "type": "manual"
    },
    {
        "id": "1",
        "tags": {
            "name": "Snow Leopard"
        },
        "type": "faq"
    },
    {
        "id": "2",
        "tags": {
            "name": "Microsoft"
        },
        "type": "manual"
    },
    {
        "id": "2",
        "tags": {
            "name": "Microsoft"
        },
        "type": "manual"
    }
]
}

And now:

  $array = json_decode($json);
  var_dump($array);

returns:

array(1) {
  ["items"]=>
  array(4) {
    [0]=>
    array(3) {
      ["id"]=>
      string(1) "2"
      ["tags"]=>
      array(1) {
        ["name"]=>
        string(9) "Microsoft"
      }
      ["type"]=>
      string(6) "manual"
    }
    [1]=>
    array(3) {
      ["id"]=>
      string(1) "1"
      ["tags"]=>
      array(1) {
        ["name"]=>
        string(12) "Snow Leopard"
      }
      ["type"]=>
      string(3) "faq"
    }
    [2]=>
    array(3) {
      ["id"]=>
      string(1) "2"
      ["tags"]=>
      array(1) {
        ["name"]=>
        string(9) "Microsoft"
      }
      ["type"]=>
      string(6) "manual"
    }
    [3]=>
    array(3) {
      ["id"]=>
      string(1) "2"
      ["tags"]=>
      array(1) {
        ["name"]=>
        string(9) "Microsoft"
      }
      ["type"]=>
      string(6) "manual"
    }
  }
}

And array_unique works.

array_unique helps remove duplicating array but it also adds serial number! how to remove serial number from each entry?

user3886556 · Accepted Answer · 2015-07-03 15:25:52Z

0

I got the solution for this.

$login_data1['items'] =array_values(array_unique($login_data1['items'] ,SORT_REGULAR));

Try array_value and array_unique together and serial number will be removed!

answered Jul 3, 2015 at 15:25

user3886556

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Comments

user3752006 · Accepted Answer · 2015-07-04 03:17:19Z

0

$login_data1['items'] =array_values(array_unique($login_data1['items'] ,SORT_REGULAR));

answered Jul 4, 2015 at 3:17

user3752006

962 silver badges9 bronze badges

1 Comment

user3886556 Over a year ago

Thanks a lot! it helped me getting perfect result :)

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