How to search id into array and club together in php -

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ok i'm stuck, i've been working on array merge finding id array .i want find subjectid array if found merge both array , calulate actual hour in time , time(calculate timing in between). array code.. actual array:

array (     [eventlist] => array         (             [0] => array                 (                     [allday] => false                     [id] => {83ae8778-a604-46f1-94be-a045f2a9b548}                     [subjectid] => 2                     [roomid] => 2                     [fromtime] => 00:30                     [totime] => 01:45                     [plottingtype] => research                 )              [1] => array                 (                     [allday] => false                     [id] => {2b1f7b32-6d44-4700-8c50-f030b94d41f6}                     [roomid] => 2                     [fromtime] => 00:00                     [totime] => 00:45                     [plottingtype] => research                 )           [2] => array                 (                     [allday] => false                     [id] => {83ae8778-a604-46f1-94be-a045f2a9b548}                     [subjectid] => 3                     [roomid] => 2                     [fromtime] => 00:30                     [totime] => 01:45                     [plottingtype] => admin                 )          )  )  expected output: array (     [eventlist] => array         (             [0] => array                 (                     [time] => 01:15                     [plottingtype] => research                 )           [2] => array                 (                     [time] => 00:15                     [plottingtype] => admin                 )          )  )

please suggest me appropriate solution..

well should foreach through of them

$array; // array $new_array = array(); // empty new array $new_array['eventlist'] = array(); foreach($array['eventlist'] $inner) {      if(isset($inner['subjectid']) {         // work out maths time difference , put $interval         $fromtime = new datetime($inner['fromtime']);         $totime   = new datetime($inner['totime']);          $interval = $fromtime->diff($totime);         $interval = $interval->format('%h:%i');          $new_inner = array(             "time" => $interval,             "plottingtype" => $inner['plottingtype']         );         array_push($new_array['eventlist'], $new_inner);     }  }

while untested. should work php 5.4+


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