How to pass multiple variables across multiple pages?

问题

My website involves a user submitting data over several pages of forms. I can pass data submitted on one page straight to the next page, but how do I go about sending it to pages after that? Here\'s a very simplified version of what I\'m doing.

Page 1:

<?php
echo \"<form action=\'page2.php\' method=\'post\'>
Please enter your name: <input type=\'text\' name=\'Name\'/>
<input type=\'submit\' value=\'Submit\'/></form>\";
?>

Page 2:

<?php
$name=$_POST[\"Name\"];
echo \"Hello $name!<br/>
<form action=\'page3.php\' method=\'post\'>
Please enter your request: <input type=\'text\' name=\'Req\'/>
<input type=\'submit\' value=\'Submit\'/></form>\";
?>

Page 3:

<?php
echo \"Thank you for your request, $name!\";
?>

The final page is supposed to display the user\'s name, but obviously it won\'t work because I haven\'t passed that variable to the page. I can\'t have all data submitted on the same page for complicated reasons so I need to have everything split up. So how can I get this variable and others to carry over?

回答1:

Use sessions:

session_start(); on every page

$_SESSION['name'] = $_POST['name'];

then on page3 you can echo $_SESSION['name']

回答2:

You could store the data in a cookie on the user's client, which is abstracted into the concept of a session. See PHP session management.

回答3:

if you don't want cookies or sessions: use a hidden input field in second page and initialize the variable by posting it like:

page2----

$name=$_POST['name'];  /// from page one

<form method="post" action="page3.php">
 <input type="text" name="req">
 <input type="hidden" name="holdname" value="<? echo "$name"?>"> 
 ////////you can start by making the field visible and see if it holds the value
</form>

page3----

$name=$_POST['holdname'];    ////post the form in page 2
$req=$_POST['req'];    ///// and the other field
echo "$name, Your name was successfully passed through 3 pages";

回答4:

As mentioned by others, saving the data in SESSION is probably your best bet.

Alternatly you could add the data to a hidden field, to post it along:

page2:

 <input type="hidden" name="username" value="<?php echo $name;?>"/>

page3

echo "hello $_POST['username'};

回答5:

You can create sessions, and use posts. You could also use $_GET to get variables from the URL.

Remember, if you aren't using prepared statements, make sure you escape all user input...

回答6:

Use SESSION variable or hidden input field

来源：https://stackoverflow.com/questions/20294915/how-to-pass-multiple-variables-across-multiple-pages