[SOLVED] Reading cookies

[Rushy]

Hey guys,

 

another quick question.

 

Can anyone tell me how to use PHP to read ALL cookies? I know how to read a specific cookie...

echo $_COOKIE["name"];

or something like that..

 

But instead of having to input the name of the cookie, how do I read all of them?

 

Cheers

[pocobueno1388]

<?php

foreach($_COOKIE as $cookie){
   echo $cookie.'<br>';
}

?>

[Rushy]

Thanks for that! Sorry, but one more question (i'm really new to PHP so i'm having trouble.)

 

How would I put that code in one line? Specifically this line

 

"echo fwrite($file,"$COOKIE");

 

Is it possible to start and end a loop within a line of code?

[pocobueno1388]

<?php

foreach($_COOKIE as $cookie){
   fwrite($file, $cookie);
}

?>

 

Why are you trying to echo the fwrite() function? That is for writing to a file.

[Rushy]

Correct. I am writing information (trying to) from the cookie to an XML file.

 

I'll give that a go

[Rushy]

Thanks for that! It works great. Just one more quick question.. how do I delete every cookie I just displayed by clicking a button? I assume i'd make the code a function and use the 'OnClick' method to call it?

 

Could anyone help me with the code? It should only be a few lines right?

 

(This is not for the writing to file part)

 

Cheers

[Rushy]

On second thought, could I do it all with something like this:

 

			<?php
			foreach($_COOKIE as $cookie){
				echo $cookie.'<br>';
				echo '<input type=button value=Delete onClick='setCookie($cookie, time()-3600);
			}
		?>

 

That doesn't work.. but could it?

 

Edit: ah.. no it won't.. PHP is serverside.. hmm.. is there anything similiar to that I could do?

[nuxy]

Rushy, the onClick event cannot be used to execute php functions.

 

You could however do something alike this.

<?php
echo '<form action="' . $_SERVER['PHP_SELF'] . '" method="post">';
foreach ($_COOKIE as $name => $value) {
echo '[' . $name . '] => <input type="text" name="' . $name . '" value="' . time() . '"><br>';
unset($name);
unset($value);
}
echo '</form>';
if (!empty($_POST)) {
foreach ($_POST as $name => $value) {
	setcookie($name, '', time());
}
}
?>

I have not tested this yet, but it should work.

I will test it in a bit. (:

[Rushy]

Hi,

 

thank you for that code

 

It doesn't work however. I'll do my best to debug it though.

 

Thanks again

[Rushy]

When I run that code I get this on the page:

 

 '; foreach ($_COOKIE as $name => $value) { echo '[' . $name . '] =>
'; unset($name); unset($value); } echo ''; if (!empty($_POST)) { foreach ($_POST as $name => $value) { setcookie($name, '', time()); } } ?> 

 

And a textbox..

 

I haven't had any luck debugging it

[TutorMe]

To show all cookies, use this:

print_r($_COOKIE);

 

[jordanwb]

If you wish to delete a cookie use the following format of the setcookie function:

 

<?php

// Now let's say there's a cookie called "foo"

setcookie ('foo', '', time () - 3600);

?>

 

The first parameter is the name of the cookie, the second is the value (which is set to empty), and the third is the time expire. There are two additional parameters: domain and path (in that order).

[Rushy]

If you wish to delete a cookie use the following format of the setcookie function:

 

<?php

// Now let's say there's a cookie called "foo"

setcookie ('foo', '', time () - 3600);

?>

 

The first parameter is the name of the cookie, the second is the value (which is set to empty), and the third is the time expire. There are two additional parameters: domain and path (in that order).

 

Yup I realise that. But i'm wanting to delete *ALL* cookies.

[ryeman98]

Couldn't you use a foreach?

 

Like ... foreach cookies as $cookie

setcookie ... ... ...

 

Or does that not work?

[centerwork]

<?php
if($submit = "Delete") {
     foreach($_COOKIE as $cookie){
     setCookie($cookie, time()-3600);
     }
}
?>

 

Just insert the form on your page with a submit button to triger the PHP Code in your header.

[centerwork]

I am guessing on the above.

 

But dont forget the $submit = $_post['submit'];

 

 

Make sure you insert the name="submit" in your submit button.

[Rushy]

Hmm with that code for some weird reason I get this error:

 

"Warning: Cookie names can not contain any of the folllowing '=,; \t\r\n\013\014' (95.39^Computer Science - an overview) in C:\Web\WebServer\Apache2\htdocs\checkout.html on line 54"

 

even though my cookies don't have any of those chars in them.. hmm

[centerwork]

I think you may need to add a

 

$cookie = urldecode($cookie);

 

before you setCookie($cookie,....

[Rushy]

Hmm nope, that didn't seem to make a difference.

 

 

[Rushy]

Didn't think it'd be so hard to delete all cookies  :-\

[nuxy]

Didn't think it'd be so hard to delete all cookies  :-\

That is not hard at all,

Here is a script from the php.net website.

<?php

// unset cookies
if (isset($_SERVER['HTTP_COOKIE'])) {
    $cookies = explode(';', $_SERVER['HTTP_COOKIE']);
    foreach($cookies as $cookie) {
        $parts = explode('=', $cookie);
        $name = trim($parts[0]);
        setcookie($name, '', time()-1000);
        setcookie($name, '', time()-1000, '/');
    }
}

?>

Source: http://www.php.net/manual/en/function.setcookie.php#73484

[Rushy]

Didn't think it'd be so hard to delete all cookies  :-\

That is not hard at all,

Here is a script from the php.net website.

<?php

// unset cookies
if (isset($_SERVER['HTTP_COOKIE'])) {
    $cookies = explode(';', $_SERVER['HTTP_COOKIE']);
    foreach($cookies as $cookie) {
        $parts = explode('=', $cookie);
        $name = trim($parts[0]);
        setcookie($name, '', time()-1000);
        setcookie($name, '', time()-1000, '/');
    }
}

?>

Source: http://www.php.net/manual/en/function.setcookie.php#73484

 

Yes! That's what i'm after. Thanks for that, much appreciated

[jordanwb]

Hold on, You have to put in the value parameter or else that won't delete the cookie:

 

<?php
if($submit = "Delete") {
     foreach($_COOKIE as $cookie){
     setCookie($cookie, '',  time()-3600);
     }
}
?>