Question 276994 in PHP Question posted in
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Php – Need Help Combining various elements of a nested array

I’m using PHP, and I have the following array and have been trying to figure out how I can flatten it in the following manner. This is an array that is created from a JSON by using json_decode, and the end result will be another json file.

So wherever we have a unique name, the patternType and type will always be the same in every element of the parent array. I need a way to basically "collapse" the array and combine the array’s while adding new element to the action array.

Current Data Structure.

Array
(
    [abc] => Array
            [0] => Array
                (
                    [foo] => *
                    [action] => Read
                    [resource] => Array
                        (
                            [name] => name_1
                            [patternType] => fixed
                            [type] => partition
                        )

                )

            [1] => Array
                (
                    [foo] => *
                    [action] => Write
                    [resource] => Array
                        (
                            [name] => name_1
                            [patternType] => fixed
                            [type] => partition
                        )

                )

            [2] => Array
                (
                    [foo] => *
                    [action] => Read
                    [resource] => Array
                        (
                            [name] => name_2
                            [patternType] => fixed
                            [type] => partition
                        )

                )

            [3] => Array
                (
                    [foo] => *
                    [action] => Alter
                    [resource] => Array
                        (
                            [name] => name_2
                            [patternType] => fixed
                            [type] => partition
                        )

                )

)

Needed Data Structure

Array
(
    [abc] => Array
            [0] => Array
                (
                    [foo] => *
                    [action] => Array
                        (
                            [0] => Read
                            [1] => Write
                        )
                    [resource] => Array
                        (
                            [name] => name_1
                            [patternType] => fixed
                            [type] => partition
                        )

                )
            [1] => Array
                (
                    [foo] => *
                    [action] => Array
                        (
                            [0] => Read
                            [1] => Alter
                        )
                    [resource] => Array
                        (
                            [name] => name_2
                            [patternType] => fixed
                            [type] => partition
                        )

                )
)

I’ve tried various functions like array_merges, array_merge_recursive, etc… I also tried looping through the array, and creating a secondary array and creating the data structure properly there, but i always have the problem of figuring out how to reference the parent arrays in that case, b/c the order of the child arrays can always differ.

Tags:

2

Answers


  1. 0

    here is the solution for you

    <?php
$array = [
    "abc" => [
        [
                    "foo" => "*",
                    "action" => "Read",
                    "resource" => [
                            "name" => "name_1",
                            "patternType" => "fixed",
                            "type" => "partition"
                        ]

        ],
        [
                    "foo" => "*",
                    "action" => "Write",
                    "resource" => [
                            "name" => "name_1",
                            "patternType" => "fixed",
                            "type" => "partition"
                        ]

        ],
        [
                    "foo" => "*",
                    "action" => "Read",
                    "resource" => [
                            "name" => "name_2",
                            "patternType" => "fixed",
                            "type" => "partition"
                        ]

        ],
         [
                    "foo" => "*",
                    "action" => "Alter",
                    "resource" => [
                            "name" => "name_2",
                            "patternType" => "fixed",
                            "type" => "partition"
                        ]


        ],
    ]
    
];

$grouparr = [];
$tempVal;
$action;



foreach ($array['abc'] as $key => $val) {
   if ($val['resource']['name'] == @$tempVal['resource']['name']){
    $grouparr[$key] = $val;
    $actions = [$action];
    array_push($actions, $grouparr[$key]['action']);
    $grouparr[$key]['action'] = $actions;

   } else {
     $action = $val['action'];
     $tempVal = $val;
   }
      
 }

print_r(array_values($grouparr));

?>
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  2. 0

    To achieve the desired data structure, you can loop through the original array and use a temporary associative array to group the elements by the "name" field. You can then create the desired structure from this temporary array. Here is a PHP code example to do that:

    $inputArray = [
    'abc' => [
        [
            'foo' => '*',
            'action' => 'Read',
            'resource' => [
                'name' => 'name_1',
                'patternType' => 'fixed',
                'type' => 'partition',
            ],
        ],
        [
            'foo' => '*',
            'action' => 'Write',
            'resource' => [
                'name' => 'name_1',
                'patternType' => 'fixed',
                'type' => 'partition',
            ],
        ],
        [
            'foo' => '*',
            'action' => 'Read',
            'resource' => [
                'name' => 'name_2',
                'patternType' => 'fixed',
                'type' => 'partition',
            ],
        ],
        [
            'foo' => '*',
            'action' => 'Alter',
            'resource' => [
                'name' => 'name_2',
                'patternType' => 'fixed',
                'type' => 'partition',
            ],
        ],
    ],
];

$outputArray = [];

foreach ($inputArray as $key => $items) {
    $tempArray = [];

    foreach ($items as $item) {
        $name = $item['resource']['name'];

        if (!isset($tempArray[$name])) {
            $tempArray[$name] = [
                'foo' => $item['foo'],
                'action' => [],
                'resource' => $item['resource'],
            ];
        }

        $tempArray[$name]['action'][] = $item['action'];
    }

    $outputArray[$key] = array_values($tempArray);
}
echo "<pre>";
print_r($outputArray);

    This will give you the desired data structure in the $outputArray.

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