<?php $array=[ [36868=>3], [2112=>3], [35901=>3], [6496=>3], [87=>3], [36868=>3], [68=>3], [9068=>3], [47=>3] ]; foreach($array as $subarray){ foreach($subarray as $k=>$v){ if(!isset($result[$k])){ $result[$k]=$subarray; }else{ $result[$k][$k]+=$v; } } } var_export(array_values($result));
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