Variable leveled multi-dimensionaled array to value 'flattend' array with PHP? [duplicate]

Question

I'm looking for a solution to flatten a variable multi-dimensionaled array to flatten all the values in the last available array to a single Array[] (containing the dataset of each last array in the multidimensional array).

Any help is appreciated!

It differs from other questions

Because the ending result should be a collection of all Arrays containing :

array(
    'title' => xx,
    'id' => xx
)

listed in the different multidimensional arrays. The different items all have fixed keys: title and id.

Sample Base array

$data = array(
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        array(
            array(
                'title' => xx,
                'id' => xx
            ),
            array(
                'title' => xx
                'id' => xx
            )
        )
    ),
    array(
        array(
            array(
                array(
                    'title' => xx,
                    'id' => xx
                ),
                array(
                    'title' => xx,
                    'id' => xx
                ),
                array(
                    'title' => xx,
                    'id' => xx
                )
            )
        ),
        array(
            'title' => xx,
            'id' => xx
        ),
        array(
            array(
                array(
                    array(
                        'title' => xx,
                        'id' => xx
                    )
                )
            )
        )
    )
);

Should be flattend to

 $data = array(
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    ),
    array(
        'title' => xx,
        'id' => xx
    )
);

It's not a duplicate of that question .... That FLATTENS the array for each key entity ... I want the array of key/ values to be kept ... — daan.desmedt
– daan.desmedt, Commented Oct 19, 2017 at 13:42
There are hundreds of "flatten array" questions. What specifically have you tried, what are you stuck on and how does your problem differ from others? — deceze
– deceze ♦, Commented Oct 19, 2017 at 13:50
idownvotedbecau.se/noattempt and idownvotedbecau.se/nocode. Help yourself, we will look at your attempts. Read on foreach for the array, and is_array to know if the value is an array or a string. Go down on an array, keep the key and value otherwise. — Nic3500
– Nic3500, Commented Oct 19, 2017 at 13:53

Mohammad Ali Akbari · Accepted Answer · 2017-10-19 14:03:17Z

1

function flatten_array(&$data) {

    foreach ($data as $index => &$item) {

        if(has_array_child($item)) {
            unset($data[$index]);
            flatten_array($item);
            $data = array_merge($data, $item);
        }

    }

}

function has_array_child($item) {
    foreach($item as $child) {
        if(is_array($child)) {
            return TRUE;
        }
    }

    return FALSE;
}

flatten_array($data);

print_r($data);

answered Oct 19, 2017 at 14:03

Mohammad Ali Akbari

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3 Comments

daan.desmedt Over a year ago

Yes, perfect! Thanks alot! As needed!

Mohammad Ali Akbari Over a year ago

not necessary, $data passed by reference.

daan.desmedt Over a year ago

My bad, overlooked that one! Thanks again ..

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