Review of the session function of easyrecovery professional php4 (1)

PHP4 has new session support than PHP3. After using it for a while, I got a general understanding of its function interface, internal mechanism, and
convenience of application.
Everyone should be clear about the meaning of session. A session can include several http requests and responses.
For example, if we use 163.net, from login to logout or timeout, it is regarded as a session. The unique identifier of the session
is usually within the system. Generate a unique session ID, usually a very long
string. In addition to the session ID, a session can also have its own session data, which can record and distinguish different statuses of the session.
php4 provides the following interfaces for session operations:
session_start — Initialize session data
session_destroy — Destroys all data registered to a session
session_name — Get and/or set the current session name
session_module_name — Get and/or set the current session module
session_save_path — Get and/or set the current session save path
session_id — Get and/or set the current session id
session_register — Register a variable with the current session
session_unregister — Unregister a variable from the current session
session_is_registered — Find out if a variable is registered in a session
session_decode — Decodes session data from a string
session_encode — Encodes the current session data as a string
You can understand the meaning at a glance, session_start starts a session, session_destroy ends
Ends a session, session_id is obtained The current session_id, session_register registers a variable with the current session. This is very useful. For example, when a user visits a mall and selects certain products, you can use session_register to register the product name or code into the current session.
For example, the following example (extracted from php manual):
session_register("count");
$count++;
?>
Hello visitor, you have seen this page echo $count; ?> times.

# the =SID?> is necessary to preserve the session id
# in the case that the user has disabled cookies
To continue, click here
session_register can implicitly trigger session_start (if the user has not sent a session_
start call before), the current session registers a variable count, every time the user clicks click When here
, this variable will be increased by one. You can try it yourself. The meaning of =SID?> is not detailed here.

The above introduces the review of the session function of easyrecovery professional php4 (1), including the content of easyrecovery professional. I hope it will be helpful to friends who are interested in PHP tutorials.