PHP 中的用户定义按钮

使用 type="submit" 和 method="GET":

echo "<form method ='GET' action='cart.php'>";
    echo "<p><label> Quantity: ";
        echo "<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
    echo "</label>";
    echo "
        <input type='hidden' name='pid' value='$prodID' />
        <input type='submit' value='Add To Cart' />
    ";
echo "</p></form>";