hook of voting complete

Yeap there is, the hook name is called rate_post https://github.com/lesterchan/wp-postratings/blob/master/wp-postratings.php#L633

Thanks, and sorry for my poor WP and programming skill, would you guide me how to bring the $post_id, $post_user, and $post_rate to the function?

I tried the following but got the php warning in the rating,

add_action(‘rate_post’, ‘add_activity_stream’);

function add_activity_stream ($user_id, $post_user, $post_rate) {
//do something
}

You can always refer to the docs https://codex.www.ads-software.com/Function_Reference/add_action

I got it. It’s easy but Stackoverflow explain it more clearly. For those who are looking for the same thing,

add_action(‘rate_post’, ‘add_activity_stream’, 10, 3);
function add_activity_stream ($rate_userid, $post_id, $ratings_value) {
//do something.
}

reference: https://stackoverflow.com/questions/2843356/can-i-pass-arguments-to-my-function-through-add-action