How can I enter in function "is_woocommerce()" in WordPress when I use "wp_headers" hook filter? [closed]

I have this function,but I can enter in the function is_woocommerce().
if I put this code:

function the_name ($headers){
    if ( function_exists( ‘is_woocommerce’ ) ) {
        if ( is_woocommerce() ) {
            $headers[‘Cache-Control’]=”public, max-age=0, s-maxage=10800″;
            return $headers;
        }
    }
}
add_filter(‘wp_headers’, ‘the_name’);

it is enter in is_woocommerce BUT it doesn’t enter in is_woocommerce().
How can I do to enter in this function when I use wp_headers filter?

Thanks.