Multi dimensional array PHP

Question

I have an array like this

 $array = [
            [
                'relation' => 'AND',
                [
                    'key1' => ['dog', 'dog'],
                    'key2' => [1, 2, 3]
                ],
            ],
            [
                'relation' => 'OR',
                [
                    'key1' => ['cat', 'cat'],
                    'key2' => [7, 8, 9]
                ],
                [
                    'key1' => ['cow', 'cow'],
                    'key2' => [7, 11, 9]
                ],
            ]
        ];

I am trying to have an output like this

$output = [
            'animals'=>[
                'relation' => 'AND',
                [
                    'key1' => 'dog', //convert to a single item
                    'key2' => [1, 2, 3]
                ],
                [ // array at subsequent index is pushed into the array
                    'relation' => 'OR',
                    [
                        'key1' => 'cat',
                        'key2' => [7, 8, 9]
                    ],
                    [
                        'key1' => 'cow',
                        'key2' => [7, 11, 9]
                    ],
                    // [
                    //     ....subsequent array is pushed into the array
                    // ]
                ]           
            ]
        ];

I tried using array map to merge the duplicate values and then iterate but not sure how to solve it, would really appreciate some approach to solve this.

Answer 1

This iteration will solve your duplicate issue, then you can use $array
array_unique($item) This function takes an input array and returns a new array without duplicate values.

foreach($array as $key1 => $items){
    for($i = 0; $i < count($items)-1; $i++){
        foreach($items[$i] as $key2 => $item){
            $uniqueArr= array_unique($item);
            $array[$key1][$i][$key2]= $uniqueArr;
        }
    }
}