Addcartphp Num High Quality Instant

// Check if requested quantity exceeds available stock if ($num > $product['stock_quantity']) die(json_encode([ 'error' => 'Insufficient stock', 'available' => $product['stock_quantity'] ]));

public function testAddToCartWithInvalidStringNum() addcartphp num high quality

A high-quality backend needs an equally robust frontend. Use JavaScript to enforce numeric integrity before the request reaches addcartphp . // Check if requested quantity exceeds available stock

// Retrieve and validate the numeric quantity 'num' $num = filter_input(INPUT_POST, 'num', FILTER_VALIDATE_INT); $product_id = filter_input(INPUT_POST, 'product_id', FILTER_VALIDATE_INT); $product['stock_quantity']) die(json_encode([ 'error' =&gt