isset($_POST)太多次

我正在制作一个简单的菜单应用程序。我做了一个特殊的类Dish,我想对应用程序中的按钮做出反应。首先,如果你想吃饭或喝酒,你必须做出选择,而且效果很好。然后,你必须选择你的菜肴(波兰-意大利-墨西哥),它很完美,但后来你应该可以选择是想吃一顿饱饭还是只吃一顿晚餐,因为某种原因,它不起作用。我和以前一样遵循同样的规则,但现在不行了。希望我能得到一些答案,而不是说我的代码有多糟糕。

<?php

    class Dish
    {
        private $Price;
        private $Name;

        public function setData($Price, $Name)
        {
            $this->Price = $Price;
            $this->Name = $Name;
        }

        function getPrice()
        {
            return $this->Price;
        }

        function getName()
        {
            return $this->Name;
        }

    }
    // It could be much faster by using database...

    $Polish_Dinner = new Dish;
    $Polish_Dinner->setData("3$", "Kapuśniak");
    $Polish_Desser = new Dish;
    $Polish_Desser->setData("3$", "Kapuśniak z cukrem");


    $Mexican_Dinner = new Dish;
    $Mexican_Dinner->setData("4$", "Fasola");
    $Mexican_Desser = new Dish;
    $Mexican_Desser->setData("4$", "Fasola z cukrem");


    $Italy_Dinner = new Dish;
    $Italy_Dinner->setData("5$", "Pizza");
    $Italy_Desser = new Dish;
    $Italy_Desser->setData("5$", "Pizza z cukrem");

?>
<div style="background-color: gray;">

    <?php
        $zamowienie[10] = new Dish;
        $i=0;
    ?>

    <form action ="index.php" method="post">
                <input type="submit" value="Dinner" name="Dinner" style="margin: 35px; display: inline;  ;width: 35%; height: 300px" />
                <input type="submit" value="Cash" name="Cash" style="display: inline;  width: 10%; height: 75px" />
                <input type="submit" value="Drink" name="Drink" style="margin: 35px   ; display: inline; width: 35%; height: 300px"/></br>
    </form>
        </br></br></br>
      <?php
        if(isset($_POST['Dinner']))
        {
            ?>
            <form action ="index.php" method="post" style="background-color: darkgreen;">
                <input type="submit" value="Mexican" name="Mexican" style="display: inline; width: 10%; height: 100px" />
                <input type="submit" value="Polish" name="Polish" style="display: inline;  width: 10%; height: 100px" />
                <input type="submit" value="Italy" name="Italy" style=" display: inline;   width: 10%; height: 100px"/></br>
            </form>
        <?php
        }
        elseif(isset($_POST['Drink'])) 
        {
        ?>
            <form action ="index.php" method="post" style="background-color: darkgreen;">
                <input type="submit" value="ice" name="ice" style=" display: inline;width: 10%; height: 100px" />
                <input type="submit" value="lemon" name="lemon" style=" display: inline;width: 10%; height: 100px" />
            </form>
       <?php
        }
        switch(true)
        {
            case isset($_POST['Mexican']):

                ?>
                <form action ="index.php" method="post" style="background-color: darkblue;">
                    <input type="submit" value="Mex_Lunch" name="Mex_Lunch" style=" display: inline;width: 10%; height: 100px" />
                    <input type="submit" value="Mex_Desser" name="Mex_Desser" style=" display: inline;width: 10%; height: 100px" />
                </form>
                <?php
                echo "Mexican";
                    if(isset($_POST['Mex_Desser']))
                    {
                        echo "Mex_Des";
                        $zamowienie[$i]=$Mexican_Desser;
                        $zamowienie[$i]->getName();
                        $i++;
                        $zamowienie[$i]=$Mexican_Dinner;
                        $zamowienie[$i]->getName();
                        $i++;
                    }
                    elseif(isset($_POST['Mex_Lunch']))
                    {
                        echo "Mex_Din";
                        $zamowienie[$i]=$Mexican_Dinner;
                        $i++;
                    }
                    echo $_POST['Mex_desser'];
                break;
            case isset($_POST['Polish']):
                 ?>
                <form action ="index.php" method="post" style="background-color: darkblue;">
                    <input type="submit" value="Pol_Lunch" name="Pol_Lunch" style=" display: inline;width: 10%; height: 100px" />
                    <input type="submit" value="Pol_Desser" name="Pol_Desser" style=" display: inline;width: 10%; height: 100px" />
                </form>
                <?php
                echo "POLISh";
                if(isset($_POST['Pol_Desser']))
                    {
                        $zamowienie[$i]=$Polish_Desser;
                        $i++;
                        $zamowienie[$i]=$Polish_Dinner;
                        $i++;
                    }
                    elseif(isset($_POST['Pol_Lunch']))
                    {
                        $zamowienie[$i]=$Polish_Dinner;
                        $i++;
                    }
                break;
            case isset($_POST['Italy']):
                ?>
                <form action ="index.php" method="post" style="background-color: darkblue;">
                    <input type="submit" value="It_Lunch" name="It_Lunch" style=" display: inline;width: 10%; height: 100px" />
                    <input type="submit" value="It_Desser" name="It_Desser" style=" display: inline;width: 10%; height: 100px" />
                </form>
                <?php
                echo "ITALY";
                if(isset($_POST['It_Desser']))
                    {
                        echo "LUNCH + DESSER ITALY";
                        $zamowienie[$i]=$Italy_Desser;
                        $i++;
                        $zamowienie[$i]=$Italy_Dinner;
                        $i++;
                    }
                    elseif(isset($_POST['It_Lunch']))
                    {
                        echo "Lunch italy";
                        $zamowienie[$i]=$Italy_Dinner;
                        $i++;
                    }
                break; 
        }
        ?>

</div>

此外: 我很乐意提出如何做得更好的建议 css 喜欢这个,所以请跳过这个评论)。