I put simple php condition in the header.php of template as this :

setcookie("test_time_".$cookie_id."", $cookies_times, time()+3600);

The result always as this headers already sent, I use this inside plugin and also I try outside the plugin and the result always the same.

It´s possible use cookies in header or what can i do for fix this problem , I need use cookies for works little function.

1 Answer 1


The issue you have appears because you set your cookies too late. You have to set it before anything will be rendered. Set your cookies in the your-plugin-file.php file.

Also you can check if headers were sent or not by calling headers_sent() function:

add_action( 'init', 'wpse8170_init' );
function wpse8170_init() {
    if ( !headers_sent() ) {
        setcookie("test_time_".$cookie_id."", $cookies_times, time()+3600);
  • The probem i use plugin and i don´t know how i can do this , how i can include this from plugin in header ? , thak´s Oct 10, 2013 at 15:21
  • I have updated my answer, check it now Oct 10, 2013 at 15:23
  • If you think that the answer is correct, then mark it as it is. Oct 10, 2013 at 16:55
  • Yes , one thing more please , if i have for example one file in my plugin called code.php how i can insert in header this file from plugin it´s my last question , thank´s regards !!! Oct 10, 2013 at 17:07
  • You shouldn't insert it into the header. Just add the snippet into your code.php file and it will add a cookie for you. Oct 10, 2013 at 17:20

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