Grouping and Merging array in PHP

Question

I have an array mentioned below.

$array = array(
        \'0\' => array(
            \'names\' => array(0 => \'Apple\'),
            \'group\' => 1
         


        

Answer 1

 array(
            'names' => array(0 => 'Apple'),
            'group' => 1
        ),
        '1' => array(
            'names' => array(0 => 'Mango'),
            'group' => 1
        ),
        '2' => array(
            'names' => array(0 => 'Grapes'),
            'group' => 1
        ),
        '3' => array(
            'names' => array(0 => 'Tomato'),
            'group' => 2
        ),
        '4' => array(
            'names' => array(0 => 'Potato'),
            'group' => 2
        )
    );
    //result will be here
    $result = array();

    foreach ($array as $key => $value) {
        //check if we have keys group or names to avoid errors
        if(!isset($value['group']) || !isset($value['names']))
            continue;

        //make a key in result array if its not exist
        if(!isset($result[$value['group']]))
        {
            $result[$value['group']] = $value['names'];
        }
        else
        {
            //add a values to key if it exists
            $result[$value['group']] = array_merge($result[$value['group']], 
                $value['names']);
            //filter same values
            $result[$value['group']] = array_values(array_unique($result[$value['group']]));
        }
    }
    print_r($result);