Online PHP editor | output for q7NCt

<?php $arr = [ ['Cup red' => 2], ['TV-1' => 1], ['TV-1' => 1], ['Table' => 1], ['Table' => 1], ['Cup white' => 1], ['Cup white' => 3], ['Cup green' => 4], ]; $keyStore = []; foreach($arr as $record) { foreach($record as $key => $value) { $keyStore[$key] = $key; } } $result = []; foreach ($arr as $key0 => $value) { foreach ($value as $key1 => $item) { if (in_array($key1, $keyStore)) { $result[$key1] = isset($result[$key1]) ? $result[$key1] += $item : $result[$key1] = $item; } } } echo '<pre>'; print_r($result); echo '</pre>';