Question

我正在尝试使用SESSION从一个PHP页面传递给下一个变量。

第一页包含此代码，用户点击提交后，将转到第2页：

<!--SESSIONS TO PASS ON VARIABLES-->
<?php $_SESSION['file'] = $file; ?>
<?php $_SESSION['linecount'] = $linecount; ?>
<?php $_SESSION['priceperpost'] = $priceperpost; ?>
<?php $_SESSION['totalcost'] = $totalcost; ?>
<!--//SESSIONS TO PASS ON VARIABLES-->

这是我提交表单后在下一页第2页上的内容：

<!--VARIABLES FROM PREVIOUS PAGE-->
<?php $file = $_SESSION['file']; ?>
<?php $linecount = $_SESSION['linecount']; ?>
<?php $priceperpost = $_SESSION['priceperpost']; ?>
<?php $totalcost = $_SESSION['totalcost']; ?>
<!--//VARIABLES FROM PREVIOUS PAGE-->

但它没有得到代码，因为我试图回应第2页上的变量：

  <u>Number of Posts:</u> <?php echo ($linecount); ?><br>
  <br>
  <u>Price Per Post:</u> $<?php echo ($priceperpost); ?> <br>
  <u>Total Cost:</u> $<?php echo ($totalcost); ?><br>
  <br>

请帮助，因为我不知道我做错了什么，非常感谢任何帮助。

是的我还调用了session_start

以下是更新后的代码：

 <?php 
session_start(); 
$_SESSION['file'] = $file;
$_SESSION['linecount'] = $linecount;
$_SESSION['priceperpost'] = $priceperpost;
$_SESSION['totalcost'] = $totalcost; 
?>

并在下一页

<?php
session_start();
$file = $_SESSION['file'];
$linecount = $_SESSION['linecount'];
$priceperpost = $_SESSION['priceperpost'];
$totalcost = $_SESSION['totalcost']; 
?>

Answer 1

确保在创建变量之前和调用它们之前启动会话：

session_start();

Answer 2

您确定您的变量设置为$ totalcost吗？对您的代码发表评论。除非您正在进出PHP和HTML，否则您无需在每一行上打开和关闭PHP。

这可以改写：

<!--SESSIONS TO PASS ON VARIABLES-->
<?php $_SESSION['file'] = $file; ?>
<?php $_SESSION['linecount'] = $linecount; ?>
<?php $_SESSION['priceperpost'] = $priceperpost; ?>
<?php $_SESSION['totalcost'] = $totalcost; ?>
<!--//SESSIONS TO PASS ON VARIABLES-->

如：

<?php
// SESSIONS TO PASS ON VARIABLES
session_start();
$_SESSION['file'] = $file;
$_SESSION['linecount'] = $linecount;
$_SESSION['priceperpost'] = $priceperpost;
$_SESSION['totalcost'] = $totalcost; 
// SESSIONS TO PASS ON VARIABLES
?>

将PHP变量从一个动态页面传递到另一个动态页面

2 个答案: