Example 5. Counting the number of hits
of a single user
<?php
if (!session_is_registered('count')) {
session_register('count');
$count = 1;
} else {
$count++;
}
?>
<p>
Hello visitor, you have seen this page <?php echo $count;
?> times.
</p>
<p>
To continue, <a href="nextpage.php?<?php echo
strip_tags(SID); ?>">click
here</a>.
</p>
The strip_tags() is used when printing the SID in order
to prevent XSS related attacks.
Printing the SID, like shown above, is not necessary if
--enable-trans-sid was used to compile PHP.
Note: Non-relative URLs are assumed to point to external
sites and hence don't append the SID, as it would be a security
risk to leak the SID to a different server.
Custom Session Handlers
To implement database storage, or any other storage method,
you will need to use session_set_save_handler() to create
a set of user-level storage functions.
Table of Contents
session_cache_expire -- Return current cache expire
session_cache_limiter -- Get and/or set the current cache
limiter
session_commit -- Alias of session_write_close()
session_decode -- Decodes session data from a string
session_destroy -- Destroys all data registered to a session
session_encode -- Encodes the current session data as a
string
session_get_cookie_params -- Get the session cookie parameters
session_id -- Get and/or set the current session id
session_is_registered -- Find out whether a global variable
is registered in a session
session_module_name -- Get and/or set the current session
module
session_name -- Get and/or set the current session name
session_regenerate_id -- Update the current session id with
a newly generated one
session_register -- Register one or more global variables
with the current session
session_save_path -- Get and/or set the current session
save path
session_set_cookie_params -- Set the session cookie parameters
session_set_save_handler -- Sets user-level session storage
functions
session_start -- Initialize session data
session_unregister -- Unregister a global variable from
the current session
session_unset -- Free all session variables
session_write_close -- Write session data and end session
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