php cookies

**bluewalrus** · 07-10-2011, 09:40 AM

In the valid everything being outputted to the browser is outputted after the header declaration. In the invalids things are being outputted before the header declaration. If you provide your full code we can be more specific, you can censor out secure parts with '****'.

**traq** · 07-10-2011, 05:14 PM

perhaps a little clarification on how webpages are served.

The headers come first in the server response. after they're done, there is a blank line, and then the content of the webpage follows (which the browser renders). For example:

Code:

 HTTP/1.1 200 OK
 Date: Mon, 23 May 2005 22:38:34 GMT 
 Server: Apache/1.3.3.7 (Unix) (Red-Hat/Linux) 
 Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT 
 Etag: "3f80f-1b6-3e1cb03b" 
 Accept-Ranges: bytes 
 Content-Length: 438 
 Connection: close 
 Content-Type: text/html; charset=UTF-8 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<meta name="generator" content="vBulletin 3.8.1" />

<meta name="keywords" content=" php cookies, dhtml, javascript, css, dynamic html, xml, html, php, cgi" />
<meta name="description" content="Page 2- php cookies PHP" />

<link rel="shortcut icon" href="favicon.ico" />
<!-- blah blah blah etc etc..........-->

in this example, the last header is the content-type header. the blank line below signals the end of the headers, and the following line (in this case, with the doctype) is the first line of content.

once php outputs anything that is not a header (e.g., text, error messages, html markup, even whitespace or html comments), then the headers end on no more headers can be sent. When you try to use a function that sets headers (like header() or setcookie()) after content has been output, you get the "...headers already sent" error, because you can't "back up" and serve another header after that section of the server response is complete.

**keyboard** · 07-14-2011, 07:54 AM

I have a different question but on the same cookie. This code

PHP Code:


<?php

$george = 60 * 60  + time(); 

setcookie('Authorization','no', $george); 

?>

I tried to set the timeout to 60 minutes. Did I get it right?

**traq** · 07-14-2011, 03:08 PM

yup.
just think: seconds,minutes,hours,days, ...etc

PHP Code:


60 /*seconds*/ * 60 /*minutes*/ * 24 /*hours*/ * 365 /*days*/

**keyboard** · 07-18-2011, 01:26 AM

I have 1 more question

for this code

PHP Code:


<?php

if(isset($_COOKIE['Authorization']))

    $cheese = $_POST['name']; 

    $inTwoMonths = 60 * 60 * 24 * 60 + time();  

    setcookie('lastVisit',$cheese, $inTwoMonths);

else

    header('location: index.php');

?>

it comes up with this error
Parse error: syntax error, unexpected T_ELSE in /home1/keyboard/public_html/setcookie.php on line 6

I don't understand what i've done wrong any help would be appreciated

**bluewalrus** · 07-18-2011, 01:58 AM

You need curly braces if your conditional is more than 1 line

PHP Code:


<?php

if(isset($_COOKIE['Authorization'])) {

    $cheese = $_POST['name']; 

    $inTwoMonths = 60 * 60 * 24 * 60 + time();  

    setcookie('lastVisit',$cheese, $inTwoMonths);

} else

    header('location: index.php');

?>

This would also work.

PHP Code:


<?php

if(isset($_COOKIE['Authorization'])) {

    $cheese = $_POST['name']; 

    $inTwoMonths = 60 * 60 * 24 * 60 + time();  

    setcookie('lastVisit',$cheese, $inTwoMonths);

} else {

    header('location: index.php');

}

?>

The curly braces aren't necessary if what the conditional controls is only one line.

**keyboard** · 07-18-2011, 02:31 AM

Thanks, it now works perfectly. How can I set this thread to resolved

**bluewalrus** · 07-18-2011, 03:26 AM

Go to your first post (http://www.dynamicdrive.com/forums/s...26&postcount=1), click edit, click go advanced, add the resolved prefix to the thread title, and you should be all set.