php - Group arrays by key value -

i have problem approaching issue have, need group arrays key value

i have 3 foreach functions

    foreach ($report_phonecall $key=>$value) {         $phonecalls[$value['datum']] =  $value['broj'];     };     foreach ($report_meeting $key=>$value) {         $meetings[$value['datum']] =  $value['broj'];     }     foreach ($report_notes $key=>$value) {         $notes[$value['datum']] =  $value['broj'];     } 

that give me array

   $phonecall = array ( [2016-07-13] => 2 [2016-07-14] => 1 [2016-07-19] =>1 )     $meetings = array ( [2016-07-13] => 1 [2016-07-14] => 1 )     $notes = array ( [2016-07-19] => 1 ) 

i need merge them 1 array foreach date this

array(2016-07-13 => array([phonecalls]=>2, [meetings]=>1, [notes]=>0)) 2016-07-14 => array([phonecalls]=>1, [meetings]=> 1, [notes]=>0).... etc 

i want group/sort them key value.

going

    $group_reports[$value[key]] = $value['broj'][$phonecalls][$meetings][$notes] 

im not sure how define it

please use below code merge array

$finalarr = array(); foreach($phonecall $key=>$val){     $finalarr[$key]['phonecalls'] = $val;     $finalarr[$key]['meetings'] = 0;     $finalarr[$key]['notes'] = 0; }  foreach($meetings $key=>$val){     if(array_key_exists($key, $finalarr)){         $finalarr[$key]['meetings'] = $val;     } else {         $finalarr[$key]['phonecalls'] = 0;         $finalarr[$key]['meetings'] = $val;         $finalarr[$key]['notes'] = 0;     } }  foreach($notes $key=>$val){     if(array_key_exists($key, $finalarr)){         $finalarr[$key]['notes'] = $val;     } else {         $finalarr[$key]['phonecalls'] = 0;         $finalarr[$key]['meetings'] = 0;         $finalarr[$key]['notes'] = $val;     } }