Merge multiple arrays php

I really need some help to figure this one out.

I've got a number of arrays and i would like to merge some of them. It looks like as following.

            while ($row = $db->fetch_array($result_set)) {
                $year           = $row['year(Tidspunkt)'];
                $month_num      = $row['month(Tidspunkt)'];
                $month      = $cal->name_of_month($row['month(Tidspunkt)']);
                $type           = $row['Klubtype'];
                $visits         = $row['count(Handling)'];
                $days_in_month = $cal->days_in_month($month_num,$year);
                $avg           = $visits / $days_in_month;
                $object_array[]= array('month' => $month , 'visits' => $visits, 'type' => $type, 'avg' => $avg);
            }
            return $month_array;

And the output looks like this

Array ( 
     [0] => Array ( [month] => Januar [visits] => 891 [type] => FK [avg] => 28.7419354839 ) 
     [1] => Array ( [month] => Januar [visits] => 23 [type] => UK [avg] => 0.741935483871 ) 
)

Now I would like to merge these two arrays based on the value of month. Imagine when I've got arrays for a whole year. Then it would be nice to have 12 arrays instead of 24. 开发者_StackOverflow中文版

Thanks for helping me out.

I think this may be what you want...

$newArray = array();

foreach($array as $value) {

   $month = $value['month'];
   unset($value['month']);
   $newArray[$month][] = $value;
}

This will give you something like...

Array ( 
     ['Januar'] => Array (
        [0] => Array( [visits] => 891 [type] => FK [avg] => 28.7419354839 ) 
        [1] => Array ( [visits] => 23 [type] => UK [avg] => 0.741935483871 ) 
)