register global option

svan_rv

i 've recently installed php4.2.x in my server.Previously i was using 4.0.3. In 4.0.3 the register global by default is set to on.But in 4.2.x it's set to off and it's recommended to set to off due to security reasons. But in all my programs i 've used i am accessing registered session variable by starting a session in each page.

That is
<?
session_start();
Then here getting the registered user name $username.
?>
But in the new version i am not getting the $username value by starting a session. Can anyone suggest me how to get the registered session variables. Also do i need use $HTTP...VARS[] to get the variables submitted using GET and POST.

Thanks for your help in advance.

svan

bad76

Hi
do you have tried with $_SESSION["variable_name"] ?

For other help look at http://www.php.net/manual/en/language.variables.predefined.php

see you

svan_rv

i got it now.I tried this way.
$SESSION["username"]="svan"';
and i am getting this value of $username in other pages. But i am not able to unregister the variable if i use
unset($SESSION["username"]);
i need to give something like session_unregister("username");
Can't we unregister using unset($_SESSION["username"].

thanks for your information.

svan

bad76

The sintax
for unset() is "void session_unset ( void)"

Try just "session_unset ();" to free all session variables.

feldon23

I don't think you can destroy PHP variables like that.

stolzyboy

sometimes it is easiest to do

$_SESSION["username"] = ""; // or false, or 0

svan_rv

it seems the session_unset() will destroy all the registered session variables. But to unregister a particular session variable it won't be appropriate.
Even i tried using _$SESSION["username"]="" / or 0 or false.

Any suggestions?

thanks

svan

stolzyboy

i didn't mean do this literally

$_SESSION["username"] = ""; // or false, or 0

i meant you can do

$_SESSION["username"] = "";

$_SESSION["username"] = false;

$_SESSION["username"] = 0;

svan_rv

i did n't do like this
$_SESSION["username"]="" / or 0 or false.

As you said i tried separately with all these options

$SESSION["username"]="";
$SESSION["username"]=0;
$_SESSION["username"]=false;

In all these cases only the session variable value changes and it's not unregistered. But none of the above options destroy this particular session variable.

so if i check
if(isset($_SESSION["username"])) it still returns true.

svan

stolzyboy

don't do a check like that then

if you set it to false

if(!$_SESSION['username'])
{
do whatever
}
else
{
do whatever else
}

or you can use empty instead of isset, isset will sometimes return true even if there is nothing in it even if it is ""

svan_rv

yes i got it now and is working. 🙂
It was a problem with isset.

i really appreciate your suggestions and help.

Thanks

svan