I am writing a plugin that needs to use a cookie to track if a user has completed a survey. The plugin runs from a shortcode placed on a page. My problem is that as the shortcode is executed after the headers are sent I can’t set the cookie – well at least I think that is why it is going wrong. This is the error message I get:
Warning: Cannot modify header information – headers already sent by (output started at /home/mynerjac/public_html/frbf/wp-content/plugins/all-in-one-seo-pack/aioseop.class.php:221)…
Any ideas how I can get round this?
This is the code I am using to set the cookie (and nothing has been echoed before this code):
$expire=time()+60*60*24*30; //Expires in one month
$url = parse_url(get_option('home'));
setcookie( $cookie_name, "done", $expire, $url['path'] . '/');
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