<?php $array = [ [ 0 => '1' , 1 => '2' ], [ 0 => '1' , 1 => '3' ], [ 0 => '2' , 1 => '4' ], [ 0 => '3' , 1 => '3' ], [ 0 => '2' , 1 => '7' ], [ 0 => '1' , 1 => '5' ], [ 0 => '2' , 1 => '6' ] ]; $result = array(); foreach ($array as $row) { if (isset($result[$row[0]])) { $result[$row[0]] += $row[1]; } else { $result[$row[0]] = $row[1]; } } print_r($result);
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