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

You could iterate the array and store everything in a separate array to the group. Afterwards, you can create the output array in the format you want it, like so:

$groups = array();
foreach($array as $subArray) {
    if (!array_key_exists($subArray['group'], $groups)) {
        $groups[$subArray['group']] = array();
    }
    $groups[$subArray['group']] = array_merge($groups[$subArray['group']], $subArray['names']);
}

$result = array();
foreach($groups as $groupId => $group) {
    $result[] = array(
        'names' => $group,
        'group' => $groupId,
    );
}

print_r($result);