Help with include

schreck00

Is it possible to pass just a single variable using include(); instead of just passing an entire file? If not, is there a simple way to pass a single variable to another php file?

halojoy

<?php
// this is any page1
session_start();
$_SESSION[ "myname" ] = "john";

?>

<?php
// this is any other php page
session_start();
$name = $_SESSION[ "myname" ];
echo "my name is " . $name;

?>

This $_SESSION[ "myname" ] variable will be remembered
until you close down your browser ( session is ended )
And can be recalled by using 'session_start' and read this variable

read more: [man]session[/man]

/halojoy
uses session to keep people logged in

<?php
// login page
session_start();
$_SESSION[ "logged_in" ] = TRUE;

// this variable 'logged_in can be checked at any other php page in my website
?>

see also this post
where you can try my little 4 page DEMO howto use SESSION!
http://www.phpbuilder.com/board/showpost.php?p=10639901&postcount=7

🙂

halojoy

schreck00 wrote:
Is it possible to pass just a single variable using include();
instead of just passing an entire file?
If not, is there a simple way to pass a single variable to another php file?

Usual is to set some variables, often at top of any page,
by including 'config.php'

This php can be very small, (or have many variables in it)

In fact you need just set one variable value in it

<?php
// this is 'setname.php';
$myname = "bill";
?>

Now including this

<?php
include 'setname.php';
echo "my name is $myname";
// will output: my name is bill
?>

schreck00

I'm a noob to PHP so I'm not sure if I did it right, but I get these errors when I use $_SESSION:
Warning: session_start(): Cannot send session cookie - headers already sent.
Warning: session_start(): Cannot send session cache limiter - headers already sent.

schreck00

What I'm trying to do is base the background image on one page off the color of another, but I don't want to execute the code from the other. I need to pass the background color variable from the one page to the other. Maybe this more in depth explanation will help.

hitman6003

You could use the GET method by putting a variable in the link to the next page...something like:

"nextpage.php?bgcolor=black" or, dynamiclly, "nextpage.php?bgcolor=<?php echo $varforbgcolorofthispage ?>"

Then, on your next page, retrieve that var by using $_GET['bgcolor'].

But, doing it this way could be a pain, as you would have to have that appended to each of your links.

schreck00

Let me further explain. Page2.php outputs a background color based on the text it out puts. Page2.php is displayed on Page1.php in an inline frame. I want to output the color from Page2.php to Page1.php so Page1.php can determine which background to display. Is it possible to use the GET method for this case?

Weedpacket

You'd have to reload Page1.php all over again, because by the time Page2.php is loaded on the client, Page1.php has already been run, output from the server, loaded by the client, and PHP was finished with it long ago.

If you want to avoid that reloading (and no doubt you do), you'd have to use client-side Javascript programming in Page2 (I don't know what that would look like, though).