how can i pass variable on a link ?

hi,
i have one links, from that user can access one of secure page...
but i want to check first, if user is already logged in, then only he can access page otherwise, he directly go to login.php from that links.
kets4uAsked:
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errowsCommented:
Then you should use sessions instead of variables on a link.

See http://www.zend.com/zend/tut/session.php for a session tutorial

or http://www.zend.com/zend/tut/tutorial-delin4.php for an authentication tutorial with cookies... as you wish !

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kohashiCommented:
link:
<a href="file.php?var1=data1&var2=data2&var3=data3">link stuff</a>

data retrieval:
$var1=$_GET["var1"];
$var2=$_GET["var2"];
$var3=$_GET["var3"];


You can add as many as you like, just keep adding a & sign in the link with 'variable name' = 'data'.

To retrieve it, you just use the $_GET environmental variable.

You can then work with those variables however you like... compare them against a database or something hard coded into the PHP file to authenticate.

hope that helps,
-kohashi
lamdorCommented:
Hi kohashi,

 I think we can't pass with URL more than 256K of data..
' don't say as many as he wants'..

 The above one works fine..

with regards
lam.
TaintedGodCommented:
I dont know about you but, its pretty hard to make a url with 256k worth of data, by hard i mean, you would never end up storing that much in an address bar.

But i think sessions is a better idea if you are worried about security.
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