I am working on a cookies first time. I set my cookies at the top of the HTML in header.php and its create cookie successfully
<?php
$haystack = "http://".$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
$needle = "/shop/?filter_results=true&widget_search=true&";
if(strpos($haystack, $needle)){
setcookie("link", $haystack);
} else {
if(strpos($haystack, "/shop/?filter_results=true&widget_search=true")){
setcookie("link",NULL);
}
}
?>
<!DOCTYPE html>
<html>
But when i add my cookie in <head>
tag the browser gives me
Warning: headers already sent by ......
I also try to add this code by wp_head
hook but its not work.
Please help me how can i set my cookie in head tag.