Merge collection of nested array elements into one array

Question

I'm trying to merge a collection of nested array elements into one array.

Array:

crop_data = [
                [
                    ["crop" => "soy"]   // 0
                ],

                [
                    ["crop" => "rye"]   // 1
                ],

                [
                    ["crop" => "tree"]  // 2
                ]
            ],

            [
                [
                    ["crop" => "salt"]  // 0
                ],

                [
                    ["crop" => "farm"]  // 1
                ]
            ],

            [
                [
                    ["year" => "2015"]
                ]
            ]

I've tried the following...

$crop_data = array();   // new array

foreach($crop_list as $value) {
    $crop_data = array_merge($value, $crop_list));
}

I would like to merge the inner elements of the three arrays into one array. Any tips on how to achieve this?

1) Have you tried something ? 2) What is your expected output? — Rizier123
– Rizier123, Commented Jul 27, 2015 at 19:52

Don't Panic · Accepted Answer · 2015-07-27 20:19:17Z

1

You can use array_walk_recursive for this.

$merged = array();
array_walk_recursive($crop_data, function($v, $k) use (&$merged) {
    $merged[$k][] = $v;
});

answered Jul 27, 2015 at 20:19

Don't Panic

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