使用$ _POST变量的PHP if语句似乎不起作用。 为什么？
[英]PHP if-statement using $_POST variable doesn't seem to work. Why?
问题描述
On one PHP server I have two files. 
在一台PHP服务器上，我有两个文件。 One file (the name is "first.php") contains this code: 一个文件（名称为“ first.php”）包含以下代码：
<html>
<head>
<title>First Page</title>
</head>
<body>
Please enter your password and age:
<form action="pass.php" method="post">
Name: <input type="text" name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
</body>
</html>
The other file ("pass.php") contains this code: 另一个文件（“ pass.php”）包含以下代码：
<html>
<head>
<title>Secon Page</title>
</head>
<body>
<?php
if ($fname=="Jack")
echo "You are Jack!";
else
echo "You are not Jack!";
?>
</body>
</html>
As far as I understand, if a user enters "Jack" in the first page, than the second page should be displayed with "You are Jack!" 据我了解，如果用户在第一页中输入“杰克”，则第二页应显示“您是杰克！”。 line, but it doesn't happen. 线，但不会发生。 Why is it so? 为什么会这样呢？
4 个解决方案
解决方案1
5 已采纳 2009-11-22 02:59:40
On your second page, instead of checking for $fname, check for $_POST['fname'] instead. 在第二页上，而不是检查$ fname，而是检查$ _POST ['fname']。 I think that is all you are missing. 我认为这就是您所缺少的。
解决方案2
3 2009-11-22 02:59:24
You probably don't have register_globals set. 您可能没有设置register_globals。 This is depreciated and will be removed in 6.x. 它已贬值，将在6.x中删除。 So for good programming you should instead of $fname try $_POST['fname'] on your second page. 因此，为了获得良好的编程效果，您应该在第二页上尝试使用$ _POST ['fname']代替$ fname。
解决方案3
1 2009-11-22 03:36:03
It might help to set the post values as variables and work with that. 将post值设置为变量可能会有所帮助。 Something like this: 像这样：
foreach($_POST as $key => $value)
{
$$key = $value;
}
Then whatever is posted will be available rather than using $_POST['xxxxx'] in your logic. 这样，发布的内容将可用，而不是在您的逻辑中使用$_POST['xxxxx'] 。
解决方案4
1 2009-11-22 03:41:27
pass.php needs to look like this pass.php需要看起来像这样
<html>
<head>
<title>Secon Page</title>
</head>
<body>
<?php
if ($_POST['fname'] =="Jack")
echo "You are Jack!";
else
echo "You are not Jack!";
?>
</body>
</html>
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