CODEWITHSUNDEEP
phpcookies
JoeCortopassi
JoeCortopassi

Reputation: 5093

Cookie not setting in PHP

Thought this was super easy, but I've spent the last half hour trying to figure it out to no avail.

$unique_id = uniqid(microtime(),1);

if (is_null($_COOKIE['client_id']))
  {
  setcookie("client_id", $unique_id);
  }

But when I go to check the cookie through $_COOKIE['client_id'], I get a null value. Any ideas whats going on?

Upvotes: 0

Views: 4961

Answers (4)

VOX
VOX

Reputation: 2923

You should set cookie with 

$_COOKIE['key'] = 'value';

Upvotes: 2

Marc B
Marc B

Reputation: 360862

The _COOKIE array is created when the script initializes, and is then left alone by PHP. Setting a cookie within the script will not magically add it to $_COOKIE. It will only show up on the next script request, or you manually assign it into $_COOKIE.

Upvotes: 3

Aik
Aik

Reputation: 3748

Yeah FallingBullets has right. Be affraid when you use UTF8 file encoding - the first chars with is sent to client is UTF8 file head ( 0xEF 0xBB 0xBF). In this case is ob-start http://php.net/manual/en/function.ob-start.php not work (UTF8 file head is sent before ob-start).

What I describe is probably characteristic of the web server. Try save jour script in ascii encoding.

Upvotes: 1

fbstj
fbstj

Reputation: 1714

Cookies have to be set before ANYTHING is outputted. also I've had many problems with cookies before.

Also, see Can't set cookies in PHP? for explanation why you cant check its existence at the same time as setting it.

Upvotes: 8

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