[Resolved] header() question

Tj_C

So I have a javascript work around for this but I would like to know what is going on so I can use the headers as it will be more reliable, right?

Page 1 is a simple page that starts a session. Page 2 then checks if a var from pg1 is set if so echo if not header(). Simple right? Well how come it doesn't work. The session works fine but if I just go directly to page 2 then all I get is a blank screen (my stupid host doesn't allow me to see errors).

Page 1-

<?php

function testses() {

session_start();

$test = "inside a fucntion";
$_SESSION[test]=$test;
}

testses();

echo "<a href=pg2.php4>click here</a>";

?>

page 2 - as I think it should be (but doesn't work)


<?php
session_start();
$test=$_SESSION[test];
if (!isset($test)) {
	header("Location: http://www.someplace.com");
	exit();
	session_destroy();
} else {
	echo "test is set for sure";
	session_destroy();
}
?>

pg 2 that works


<?php
session_start();
//$test=$_SESSION[test];
if (!isset($test)) {
	header("Location: http://www.someplace.com");
	exit();
	session_destroy();
} else {
	echo "test is set for sure";
	session_destroy();
}
?>

Why does the var matter?

Thanks

Tj😃

Rayn

I believe when you set headers you cannot set information above one. Thats why quoting out $test=$_SESSION[test]; works. What you can do to get around this is use the Output Controll functions http://us4.php.net/manual/en/ref.outcontrol.php

Tj_C

Ryan, Thanks for the help.

I looked into the output control but I can't find a way to make it work within an if.

If it don't check the var then I don't know if I wan't to send the header or not. If I don't output the var then can I still check it?

I tried

<?php
session_start();
ob_start();
$test=$_SESSION[test];
if (!isset($test)) {
	header("Location: http://www.google.com");
	ob_end_flush();
	session_destroy();
	exit();

} else {

echo "test is set for sure";
session_destroy();
}
?>

Got the same resluts.

Do you have a sample of how you may have used the output control with a conditional?

Thanks

m_tt

I'll give it a shot..

Page 1:

session_start();

$session_Data = "My Data";
session_register("session_Data");

Page 2:

if (session_is_registered("session_Data"))  {
    echo "Session data is stored";
} else {
    echo "No session data found.";
}

Also, for the host thing, try this to report errors:

@ini_set('display_errors', '1');
error_reporting(E_ERROR | E_WARNING | E_PARSE);

You can also report ALL errors/warnings/notices by using this:

error_reporting(E_ALL);

Tj_C

M@tt-

Thanks for your help, I am sure that the error reporting will help.

As for the session stuff- My session is working just fine, now I just need to figure a way to use the output control with conditionals so I can test for a session flag, and if it isn't there then send a header.

any suggestions?

Thanks

m_tt

The code I posted above should do the trick. Here is a working example, I have tested it and it works fine.

<?php
//	Page 1

session_start();

	$mySessionData = $HTTP_GET_VARS['value'];

	session_register("mySessionData");

echo 'Session was registered. The value is: ' . $HTTP_GET_VARS['value'] . '<br><br>';
echo '<a href="page2.php">Page 2</a>';

?>

<?php
//	Page 2

session_start();

if (session_is_registered("mySessionData"))	{
	//	Session data found.
	echo 'Session data was found.';
} else {
	//	Session data not found -> redirect
	header("Location: http://www.google.com/");
}

?>

Edit: For testing this.. simply pull up page1.php?value=WhatEverYouWant

Tj_C

M@tt-

Thanks man...that is essentially what I started with and it wouldn't work.

But I copied your code and it works...frustrating.

While your were helping me out I was playing with your error solutions, and I found that I could make my previously posted script work if I added you error reporting lines.

I hate to bug you but so I understand what is going on and can learn from this frustrating problem do you have any idea why that was the case?

Thanks I really appreciate it.

m_tt

Funny thing about that Tj, is that your code works fine on my server : )

Must have something to do with the way your server handles sessions. Not sure, sorry, wish I could help

Tj_C

M@tt

No problem, I appreciate your help. Hopefully today will bring a realization (about the code) 😃

Anyway the error reporting stuff was great, and it gives me a new direction to research php, more stuff to play with.