How to Get Unique Value in Multidimensional Array

How to get unique value in multidimensional array

Seems pretty simple: extract all pid values into their own array, run it through array_unique:

$uniquePids = array_unique(array_map(function ($i) { return $i['pid']; }, $holder));

The same thing in longhand:

$pids = array();
foreach ($holder as $h) {
    $pids[] = $h['pid'];
}
$uniquePids = array_unique($pids);

How to get unique value in multidimensional array PHP

if $mainArray = array(2)... , try this code:

$mainString = "";
foreach($mainArray as $array){
  foreach($array as $row){
    $mainString .= $row;
  } $mainString .= ", ";
}

$tempArray = explode(", ", $mainString);

$finishArray = array_unique($tempArray);

How to use FILTER on a multidimensional array to retrieve unique values?

Use reduce for getting the result.

var arr = [["apple","ghana",15],["apple","brazil",16],["orange","nigeria",10],["banana","bangladesh",20],["banana","ghana",6]];
const res = arr.reduce((a, c) => { if (!a.find(v => v[0] === c[0])) {  a.push(c); } return a;}, []);
console.log(res);

.as-console-wrapper {  min-height: 100% !important;  top: 0;}

how to get array unique from multidimensional array when contains associative array?

You can use array_column to convert the array into an associative array. Which will override duplicate values. Use array_values to convert the associative array into a simple array.

$arr = //Your array

$result = array_values(array_column( $arr , null, 'product_code' ));

print_r( $result );

This will result to:

Array
(
    [0] => Array
        (
            [product_code] => prod3
            [qty] => 1
        )

    [1] => Array
        (
            [product_code] => prod4
            [qty] => 7
        )

)

Doc: array_column(), array_values()

php getting unique values of a multidimensional array

array_unique is using string conversion before comparing the values to find the unique values:

Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same. The first element will be used.

But an array will always convert to Array:

var_dump("Array" === (string) array());

You can solve this by specifying the SORT_REGULAR mode in the second parameter of array_unique:

$unique = array_unique($a, SORT_REGULAR);

Or, if that doesn’t work, by serializing the arrays before and unserializing it after calling array_unique to find the unique values:

$unique = array_map('unserialize', array_unique(array_map('serialize', $a)));

How to get unique value in multidimensional array in Laravel?

$arr = [
            "PM" => ["Zeb", "Pen", "Zeb", "Eds", "Fsa", "Zeb"],
            "OS" => ["Min", "Kep", "Min"],
        ];

$cleanArray = collect($arr)->map(fn($subarr) => array_unique($subarr))->toArray();

will produce:

[
     "PM" => ["Zeb", "Pen", "Eds", "Fsa"],
     "OS" => ["Min", "Kep"]
]

group unique values in multidimensional array

Taking the note if the RestoreCode value exist only once put as it is with single model in array into account, I think you might use a foreach loop and store the RestoreCode of a single array as the key in the result array. Note that the result will differ from your wanted result as the item with a single RestoreCode will also be in the result.

Per iteration check if that key already exists. If if does not, add it and put the value for the Model in a new array.

If it does exist, add the values for TotalCharge. To get the unique values for the Models, check if the current array for Model already contains it.

If you want to reset the keys, you could use array_values.

$res = [];

foreach ($RestroreModels as $item) {
    if (isset($res[$item["RestoreCode"]])) {
        if (!in_array($item["Model"], $res[$item["RestoreCode"]]["Model"], true)) {
            $res[$item["RestoreCode"]]["Model"][] = $item["Model"];
        }
        $res[$item["RestoreCode"]]["TotalCharge"] += $item["TotalCharge"];

    } else {
        $item["Model"] = [$item["Model"]];
        $res[$item["RestoreCode"]] = $item;
    }
}

print_r(array_values($res));

Php demo

How can you make a multidimensional array unique?

Since everyone given alternatives, here's a solution to the problem at-hand. Sometimes we have to work with the data we have, not re-arrange it the way we like it. That being said, this will remove all sub-sequent entries from the array that are duplicates.

$array = Array(
  Array(
    'name'  => 'Test 3',
    'slug'  => 'test-3'
  ),
  Array(
    'name'  => 'Foo',
    'slug'  => 'Bar'
  ),
  Array(
    'name'  => 'Foo',
    'slug'  => 'Bar'
  ),
  Array(
    'name'  => 'Test 1',
    'slug'  => 'test-1'
  ),
  Array(
    'name'  => 'Test 2',
    'slug'  => 'test-2'
  ),
  Array(
    'name'  => 'Test 3',
    'slug'  => 'test-3'
  ),
);
var_dump($array);

for ($e = 0; $e < count($array); $e++)
{
  $duplicate = null;
  for ($ee = $e+1; $ee < count($array); $ee++)
  {
    if (strcmp($array[$ee]['name'],$array[$e]['name']) === 0)
    {
      $duplicate = $ee;
      break;
    }
  }
  if (!is_null($duplicate))
    array_splice($array,$duplicate,1);
}
var_dump($array);

Which will look like this:

array(6) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "Test 3"
    ["slug"]=>
    string(6) "test-3"
  }
  [1]=>
  array(2) {
    ["name"]=>
    string(3) "Foo"
    ["slug"]=>
    string(3) "Bar"
  }
  [2]=>
  array(2) {
    ["name"]=>
    string(3) "Foo"
    ["slug"]=>
    string(3) "Bar"
  }
  [3]=>
  array(2) {
    ["name"]=>
    string(6) "Test 1"
    ["slug"]=>
    string(6) "test-1"
  }
  [4]=>
  array(2) {
    ["name"]=>
    string(6) "Test 2"
    ["slug"]=>
    string(6) "test-2"
  }
  [5]=>
  array(2) {
    ["name"]=>
    string(6) "Test 3"
    ["slug"]=>
    string(6) "test-3"
  }
}
array(4) {
  [0]=>
  array(2) {
    ["name"]=>
    string(6) "Test 3"
    ["slug"]=>
    string(6) "test-3"
  }
  [1]=>
  array(2) {
    ["name"]=>
    string(3) "Foo"
    ["slug"]=>
    string(3) "Bar"
  }
  [2]=>
  array(2) {
    ["name"]=>
    string(6) "Test 1"
    ["slug"]=>
    string(6) "test-1"
  }
  [3]=>
  array(2) {
    ["name"]=>
    string(6) "Test 2"
    ["slug"]=>
    string(6) "test-2"
  }
}