Question

我正在尝试将值从登录页面传递到另一个页面。

从登录页面，成功登录将“用户名”传递回主页：

print redirect("http://example.com/cgi-bin/asg2/Assignment2.plx?x=$login");

主页面接收变量如下：

my $y = param ("x");

并使用以下语句打印：

if ($y){
print "$y";} else {print "Please log in";}

当我第一次被重定向时，$ y被打印出来没有任何问题。但是，当我在主页面中执行表单时：

<form method="POST" action="http://examplecom/cgi-bin/asg2/Assignment2.plx">

        <div id="choices">

            <h2>Make a Choice</h2>

            <input class="css-checkbox" id="Kadinski1" name="Painting" type="radio" value="Autumn in Bavaria -Wassily Kandinsky" /><span id="Kad1">Autumn in Bavaria</span><br />
            <input id="Kadinski2" name="Painting" type="radio" value="Movement I - Wassily Kadinsky" /><span id="Kad2">Movement I</span><br />
            <input id="Tamara1" name="Painting" type="radio" value="Autoportrait - Tamara De Lempicka" /><span id="Tam1">Autoportrait</span><br />
            <input id="Tamara2" name="Painting" type="radio" value="Group of Four Nudes - Tamara De Lempicka" /><span id="Tam2">Group of Four Nudes</span><br />
            <input id="Frida1" name="Painting" type="radio" value="Moses - Frida Kahlo" /><span id="Fri1">Moses</span><br />
            <input id="Frida2" name="Painting" type="radio" value="What the Water Gave Me - Frida Kahlo" /><span id="Fri2">What the Water Gave Me</span><br />
            <input id="Vincent1" name="Painting" type="radio" value="Skull of a Skeleton with a Burning Cigarette - Vincent van Gogh" /><span id="Vin1">Skull of a Skeleton with a Burning Cigarette</span><br />
            <input id="Vincent2" name="Painting" type="radio" value="Cafe Terrace on the Place du Forum - Vincent van Gogh" /><span id="Vin2">Cafe Terrace on the Place du Forum</span><br />
            <input id="Salvador1" name="Painting" type="radio" value="Swans Reflecting Elephants - Salvador Dali" /><span id="Sal1">Swans Reflecting Elephants</span><br />
            <input id="Salvador2" name="Painting" type="radio" value="The Persistence of Memory - Salvador Dali" /><span id="Sal2">The Persistence of Memory</span><br />               
            <br />              
            <input type="submit" value="Submit">
            <br />
            <br />
        </div>

</form>

它无法保存$ y的值，无论我做什么，它都会打印“else”语句。请帮忙！

Answer 1

您还没有向我们展示您的表单，但我猜测您的表单使用默认操作（即页面网址）而没有任何查询参数。

不能保持变量

1 个答案: