Session help needed!!

Anon

Hi, ive been trying to get into sessions, ive read every tutorial from webmonkey to evilwalrus to php builder and everything was going ok until i hit a snag.

heres my code. Problem is i get two error codes when i run it now,

Warning: Cannot send session cookie - headers already sent by (output started at /.....(path lists).../session3.php4:9) in /.....(path lists).../session3.php4 on line 11

Warning: Cannot send session cache limiter - headers already sent by (output started at /usr/local/etc/httpd/vhosts/uniswap/session3.php4:9) in /usr/local/etc/httpd/vhosts/uniswap/session3.php4 on line 11

just in case you were wondering, line 11 is the session_start() function. If i remove it then the session doesn't show up at all!.

please help if you can

session_start();

if(!PHPSESSID)
{
session_register("yourusername");
session_register("yourpassword");
}
else if((!$yourusername) || (!$yourpassword))
{
session_register("yourusername");
session_register("yourpassword");
}
if($username&&$password)
{
$yourusername = $username;
$yourpassword = $password;

print("<a href=\"$PHP_SELF.$PHPSESSID\">test session</a><br><br>");
}

echo $yourusername;
print("<br>");
echo $yourpassword;
print("<br>");

jariizumi

"Just in case you were wondering" is where you lost it. If session_start() was at line 11, and your PHP code stared on line 9, there must have been 8 lines of HTML before that. There's your pitfall. session_start() must come before ALL output. And yes, HTML is OUTPUT as far as the PHP parser is concerned. Put all that at the top and then your 8 lines, and then your print's. That should probably solve your problem. Hope this helps 🙂

Anon

does session_register() need to be in the header too?

neville

You need to put session_start() only before any output by way of an ECHO or any simple HTML code ....session register can be done elsewhere in the page

if (expr)
{
session_start()
}
?>

this will work but this won't

if (expr)
{
session_start()
}

Got it !!

Anon

In my script i have set a variable $yourusername using

sess_register('yourusername');

but when i use a

if(!$yourusername)
{
session_register('yourusername');
print("yourusername not set setting register");
}

it always prints the comment, even when a

echo $yourusername;

above and below the if statement output the variable from a session id.

any ideas as to why this is?
can i get away with just a

if(!$PHPSESSID)

to set the registers, or do i need to test for each variable in the session before registering new varibles?

neville

This is not the perfect solutn but try using

<?
sess_start()

if(!isset($yourusername) or !session_is_registered('yourusername'))
{
sess_reg('yourusername');
}
?>

I think this should register if the variable is not already

Neville