ahhh headers!

[sunit_modi]

Hi all,

I was wondering if you could help me. I have searched the forum already to find advice on cookies and headers but nothin of concrete value.

i get the following errors:

Warning: Cannot add header information - headers already sent by (output started at c:\apache\apache\htdocs\scripts\wrox\ch23\functions.php:44) in c:\apache\apache\htdocs\scripts\wrox\ch23\functions.php on line 49

Warning: Cannot add header information - headers already sent by (output started at c:\apache\apache\htdocs\scripts\wrox\ch23\functions.php:44) in c:\apache\apache\htdocs\scripts\wrox\ch23\functions.php on line 50

Warning: Cannot add header information - headers already sent by (output started at c:\apache\apache\htdocs\scripts\wrox\ch23\functions.php:44) in c:\apache\apache\htdocs\scripts\wrox\ch23\functions.php on line 51

All for the following code:

function deleteCookies()
{
// delete all the old cookies
for($i=0; $i<$total_items; $i++)
{
setcookie("items_tray[$i]","");
setcookie("quantity[$i]","");
}
setcookie("items_tray","");
setcookie("total_items","");
setcookie("quantity","");
}

Now i understand that the stuff about removing all blank spaces which i have done.

Any one have ideas please, it driving me mad... mad i tell you... mad.

I also get about 4 notice errors telling me about undefined variable, can i ignore these.. dont forget that they are all pointing to the file functions.php... yes you guessed it a php file holding functions.

Please Help

Many Thanks

Sunit

[sunit_modi]

sorry, the lines 44 is:

for($i=0; $i<$total_items; $i++)

line 49, 50 and 51 are:

setcookie("items_tray","");
setcookie("total_items","");
setcookie("quantity","");

repectively.

Sunit

[Anon]

Umm, are you getting the warnings about undefined variables before or after the header warnings? (Error messages count as http content.)

Lemme guess, the warning is about $total_items being undefined. Maybe you should define it before you use it:

if(!isset($total_items)) $total_items=0;

[warmwind]

It could be that you're outputting something before you set these header info's? Remember, your headers get sent to the client as soon as you echo anything. Set headers after that and they've missed the boat.

Try putting ob_start() at the beginning of your script and then ob_end_flush() after you've set all your headers ..

[jesus_hairdo]

The error message is refering to those lines as thats where you are trying to send headers, but is failing. The output has been sent before there, so your problems occur before this point.