Online PHP editor | refs for HHfT5

<?php $array = [ 0 => [ 0 => [ "Product_Name" => "Apple Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ], 1 => [ "Product_Name" => "Apple Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ] ], 1 => [ 0 => [ "Product_Name" => "Pecan Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ] ], 2 => [ 0 => [ "Product_Name" => "Strawberry Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ], 1 => [ "Product_Name" => "Pecan Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ] ], 3 => [ 0 => [ "Product_Name" => "Lemon Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ], 1 => [ "Product_Name" => "Pecan Pie - 8", "Product_Qty" => 1, "Product_Cat" => "Pies" ] ] ]; $result = []; foreach ($array as $set) { foreach ($set as ['Product_Name' => $n, 'Product_Qty' => $q]) { $result[$n] = ($result[$n] ?? 0) + $q; } } var_export($result);