: This article mainly introduces considerations for using session in php for customer verification. if you are interested in the PHP Tutorial, please refer to it. If your php. in ini, register_globals = On, all post, get, cookie, and session variables with the same name will be mixed together, you can use $ HTTP _ * _ VARS ["username"] to determine the variable you want.
However, even if the name is the same. in ini, variables_order = "GPCS" will also be determined based on the priority level. values with low levels cannot be washed out. therefore, it is wise to use session_register ("username") at the beginning. you can also use session_is_registered to determine whether the variable has been registered.
The following is an example:
If (! Session_is_registered ("username ")){
$ User_name = "";
Session_register ("username ");
}
At the same time, make sure that in your php. ini, variables_order = "GPCS" (default) S indicates that the session should be placed at the end, and the session should be preemptible.
Register_globals = On is a waste of system resources and is disabled in the optimization configuration. This avoids the so-called vulnerability.
The above describes the considerations for using session in php for customer verification, including session and customer verification, and hopes to help friends who are interested in PHP tutorials.
