Online PHP editor | refs for UMJ4p

<?php $array = array( 0 => array( "id" => 3412341233214, "number" => 21000 ), 1 => array( "id" => 12121212121212, "number" => 18000 ), 2 => array( "id" => 12121212121212, "number" => 17000 ) ); $tmp = Array(); foreach($array as $obj) { if(!isset($tmp[$obj['id']])) { $tmp[$obj['id']] = array_merge(Array('number'=>1),$obj); continue; } $tmp[$obj['id']]['number'] += $obj['number']; } echo '<pre>'; print_r(array_values($tmp)); echo '</pre>';