cookies and php - basics

deko

This is about the simplest example I could come up with, but for some reason
(not my browser's settings) it's not working...
[top of page]
<?php
setcookie($cookie_name, "cookie_content", time()+3600);
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>cookie test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>

<?php
if (isset($cookie_name))
{
print "Welcome! ";
}
else
{
print "Go away.";
}
?>

</body>
</html>

Am I missing something? thx

Jul 17 '05 #1

Subscribe Post Reply

1685

deko

Ah Ha... got it working

<?php
$cookie_name = "the_cookie_name"; <== this is what was missing
$cookie_content = "the_cookie_content";
setcookie($cookie_name, $cookie_content, time()+3600);
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>cookie test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>

<?php
if (isset($cookie_name))
{
print "Welcome! ";
}
else
{
print "Go away.";
}
?>

</body>
</html>

As for best practices, should the cookie code always be at the top of the page
like this?

Jul 17 '05 #2

deko

umm... on second thought... back to the drawing board
"deko" <dj****@hotmail.com> wrote in message
news:0l*******************@newssvr25.news.prodigy. com...

Ah Ha... got it working

<?php
$cookie_name = "the_cookie_name"; <== this is what was missing
$cookie_content = "the_cookie_content";
setcookie($cookie_name, $cookie_content, time()+3600);
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>cookie test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>

<?php
if (isset($cookie_name))
{
print "Welcome! ";
}
else
{
print "Go away.";
}
?>

</body>
</html>

As for best practices, should the cookie code always be at the top of the page
like this?

Jul 17 '05 #3

deko

Here's beta 2 - but something is still not right. I still get in without
waiting 2 hours....

<?php
$cookie_name = "www.mysite.com";
setcookie($cookie_name, time(), time()+7200); //say cookie is received at
3:00pm
//question: if the cookie has NOT yet expired, will it be set again?
//if yes, how do I prevent cookie from being set if it has not expired?
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>cookie test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>

<?php
$cookie_content = $HTTP_COOKIE_VARS[$cookie_name];
if ($cookie_content > (time()-7200))
//say it's now 4:00pm - if your cookie timestamp (3:00pm) is greater than
//(i.e. after) 2:00pm (now minus 2 hours) then you can't come in
{
print "Go away! You are allowed in here only once every 2 hours.";
}
else
{
print "Welcome! You have not been here more than once in the past 2 hours.";
}
?>

</body>
</html>

Jul 17 '05 #4

Alvaro G Vicario

*** deko wrote/escribió (Mon, 22 Mar 2004 07:02:23 GMT):

This is about the simplest example I could come up with, but for some reason
(not my browser's settings) it's not working...
[top of page]
<?php
setcookie($cookie_name, "cookie_content", time()+3600);
?>

Please note you never give any value to $cookie_name variable so cookie is
created without any name, just a value.

Set-Cookie: =cookie_content; expires=Mon, 22-Mar-04 10:30:51 GMT

--
--
-- Álvaro G. Vicario - Burgos, Spain
--

Jul 17 '05 #5

Alvaro G Vicario

Sorry, I hadn't read your followups.

*** deko wrote/escribió (Mon, 22 Mar 2004 09:07:13 GMT):

//question: if the cookie has NOT yet expired, will it be set again?
Sure. Why shouldn't?
//if yes, how do I prevent cookie from being set if it has not expired?
if()

Check first whether cookie exists.

if ($cookie_content > (time()-7200))

Try this:

echo $cookie_content

You'll notice what fails. In general, printing the value of variables helps
a lot. You'll also make good use of print_r():

echo "<pre>";
print_r($HTTP_COOKIE_VARS);
echo "</pre>";

It's not a good idea to use dots in cookie names.

--
--
-- Álvaro G. Vicario - Burgos, Spain
--

Jul 17 '05 #6

deko

Hi and thanks for the reply. What I am trying to do is very basic, I'm sure.

Again, here is my code - see comments for questions.

<?php
$cookie_name = "wwwmydomaincom";
setcookie($cookie_name, time(), time()+7200); //say cookie is received at
3:00pm
//here you say that the cookie will be set again, even if it has expired.
//the problem is, when I try to check to see if the cookie exists -
// using $HTTP_COOKIE_VARS - I get some error about the header...
//so what souldd teh code look like?
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>cookie test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>

<?php
$cookie_content = $HTTP_COOKIE_VARS[$cookie_name];
if ($cookie_content > (time()-7200))
//say it's now 4:00pm - if your cookie timestamp (3:00pm) is greater than
//(i.e. after) 2:00pm (now minus 2 hours) then you can't come in
{
print "Go away! You are allowed in here only once every 2 hours.";
}
else
{
print "Welcome! You have not been here more than once in the past 2 hours.";
}
?>

</body>
</html>

Jul 17 '05 #7

Alvaro G Vicario

*** deko wrote/escribió (Mon, 22 Mar 2004 10:49:34 GMT):

//here you say that the cookie will be set again, even if it has expired.
//the problem is, when I try to check to see if the cookie exists -
// using $HTTP_COOKIE_VARS - I get some error about the header...
//so what souldd teh code look like?

Something like this should work:

if($_COOKIE['wwwmydomaincom']!=''){
}

--
--
-- Álvaro G. Vicario - Burgos, Spain
--

Jul 17 '05 #8

deko

Okay, I think I've got it:

<?php
setcookie("cookie_name",time(),0,"/");
$cookie_check = $HTTP_COOKIE_VARS["cookie_name"];
if ($cookie_check > (time()-7200))
{
print "Try again in 2 hours.";
exit;
}
else
{
echo "the code";
}
?>

This seems to be working as desired. The problem is how to accommodate visitors
from different time zones? For example, if your time zone is 3 hours behind me,
"the code" will never run for you. Is there a way to determine the time zone
offset of my visitors?

Jul 17 '05 #9

Alvaro G Vicario

*** deko wrote/escribió (Mon, 22 Mar 2004 21:55:10 GMT):

This seems to be working as desired. The problem is how to accommodate visitors
from different time zones?

There's no need to. You are setting the time in the server.
--
--
-- Álvaro G. Vicario - Burgos, Spain
--

Jul 17 '05 #10

deko

10-4

thanks for the help. I think I'm read for cookies 102...

cheers,

deko

"Alvaro G Vicario" <al******************@telecomputeronline.com> wrote in
message news:ii****************************@40tude.net...

*** deko wrote/escribió (Mon, 22 Mar 2004 21:55:10 GMT):
This seems to be working as desired. The problem is how to accommodate visitors from different time zones?

There's no need to. You are setting the time in the server.
--
--
-- Álvaro G. Vicario - Burgos, Spain
--

Jul 17 '05 #11

Similar topics

PHP & Cookies order form

by: Daniel Ruscoe | last post by:

Hi chaps, I'm relatively new to the language, but I want to create a simple order form using PHP and cookies. Please let me know if there's a better way in this situation, database isn't...

PHP

Storing Cookies

by: Brian Burgess | last post by:

Hi all, Anyone know of any special issues with storing cookies with ASP? I'm trying this with two browsers: One is IE 6.0 with cookies set to 'prompt'. This has been working properly as any...

ASP / Active Server Pages

Writing cookies

by: Brian Burgess | last post by:

Hi all, Anyone see anything wrong with the following: *************************************************************** <%@ LANGUAGE="VBSCRIPT" %> <% Option Explicit Dim nAcctNbr Dim...

ASP / Active Server Pages

Explain abt Cookies n their uses

by: learner | last post by:

hey, iam new to HTML.I know only the basics. i want to know about cookies and how to set them? where the cookies are used? A general overview on cookies and their uses .. and how to use...

HTML / CSS

More cookies from one document?

by: Martin Mrazek | last post by:

Hi, how can one HTML document create more than one cookie? I have bloody long html form, to save all its values in 4KB of one cookie is impossible... MM

Javascript

by: Mr Newbie | last post by:

I am having trouble writing cookies despite adding the cookie to the Response.Cookeies collection. The Request.Browser.Cookies returns TRUE so I know the browser is storing cookies and I can even...

ASP.NET

Store cookies in browser cache

by: Dst | last post by:

I'm trying to interact with some old asp code. I'm logging into the asp page by posting username/password to the asp page using webrequest / webresponse. Now this works ok, the response back is...

ASP.NET

show if scripts and/or cookies are enabled

by: David Thielen | last post by:

Hi; 1) What is the easiest way to show in an aspx page if they have scripts enabled? 2) What is the easiest way to show in an aspx page if they have cookies enabled? This is for a test...

ASP.NET

checking for enabled cookies?

by: Jeff | last post by:

I have a vb.net application (2005) requiring session variables and want to test to make certain that the user's cookies are enabled. I can set a test session variable on one page and attempt to...

Visual Basic .NET

by: Jon Slaughter | last post by:

How does one handle cookies!!! I have a login script and the user inputs the information but whats the point if I cannot save the stuff because the headers are already sent. I guess I have to...

PHP

How to turn on java script in a villaon keypad mobile phone

by: Charles Arthur | last post by:

How do i turn on java script on a villaon, callus and itel keypad mobile phone

Java

Merging data from multiple Excel files

by: ryjfgjl | last post by:

In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...

Data Management

Migrating Website to Cloud - Emmanuel Katto

by: emmanuelkatto | last post by:

Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel

General

Navigating the Data Structures and Algorithms (DSA)

by: BarryA | last post by:

What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...

Algorithms / Advanced Math

Is that possible of reading the .csv file in column wise and the column have different lengths ?

by: Sonnysonu | last post by:

This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

C / C++

Changing the language in Windows 10

by: Hystou | last post by:

Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...

Windows Server

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

C / C++

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

General

AI Job Threat for Devs

by: agi2029 | last post by:

Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...

Career Advice