How set a cookie from PHP and get it without refresh

Question

I know that when use setcookie() function it create headers, and after refresh it will be available in $_COOKIES, but i need a mechanism to set cookie in this page without redirect, but to be in the browser cookie. If make something like this

setcookie('my_cookie','tmp_val');
$_COOKIE['my_cookie'] = 'tmp_val;

It is good for case when you set at once, but when you set cookie on each refresh in PHP is good but in browser cookie remains old. I try something like this

add_action('parse_request', function($tmp){
            setcookie('my_cookie','tmp_val');
            wp_safe_redirect(get_permalink());
            exit();
        });

but I have problems. Please help me in order to find a good solution.

Answer 1

You need to use the 'init' hook similar to the following:

add_action( 'init', 'your_function');
function your_function() {
    setcookie('my_cookie','tmp_val');
    wp_redirect( get_permalink() ); 
        exit; 
    } 
}

You should add a conditional 'if' statement in there to prevent it redirecting on every page though!

eg.

   add_action( 'init', 'your_function');
    function your_function() {
        setcookie('my_cookie','tmp_val');
        if ($my_cookie == "???") { 
            wp_redirect( 'go here' ); 
            exit; 
            } else {
            wp_redirect( 'go somewhere else' ); 
            exit;
        } 
    }

Also consider the 'template_redirect' hook.