如何在不将cookie放入cookie或全局变量的情况下不断设置变量的值？

I am working on a PHP system where I need to have a couple of variables constantly set throughout all classes used. Data is mostly retrieved through ajax calls and MySQL queries.

The value of each variable will not change unless a specific link is clicked.

What is the best method to achieve this? I am a bit stuck because I can use neither global variables, nor a cookie.

Thanks in advance.

N.

You should look into sessions.

Here is a simple example of using session:

 session_start();
 // Use $HTTP_SESSION_VARS with PHP 4.0.6 or less
 if (!isset($_SESSION['count'])) {
    $_SESSION['count'] = 0;
 } else {
    $_SESSION['count']++;
 }

Some html later on ...

 <p>
Hello visitor, you have seen this page <?php echo $_SESSION['count']; ?> times.
</p>

<p>
To continue, <a href="nextpage.php?<?php echo htmlspecialchars(SID); ?>">click
here</a>.
</p>

Store it in a super class then. So all subclasses derived from the super class can access this variable that is neither global nor a session variable.

<?
    class MySuperClass
    {
        protected myVariable;
    }

    class MySubClass extends MySuperClass
    {
        function bleh()
        {
            $this->myVariable = "yeah... neither global or cookie";
        }
    }
?>

// Or use $_SESSION instead of the above. $_SESSION['mynamespace']['my_variable'];

session_start();

echo $_SESSION['foo'];

$_SESSION['foo'] = $_REQUEST['foo'];

You could use a registry. But think carefully whether you really need to do this and think about dependency injection. Try and make your code loosely coupled.