I solved the issue with double clicking "Submit"

I solved the problem of double clicking "Submit" in the forum! After I joined Dolphin (Registered: 02.03.12), it was finally solved after 13 years! Finally!

Double-clicking "Submit" will post 2 discussions, but the latest one will not be opened!

Open modules / boonex / forum / classes / DbForum.php then correct it to this:

    function newTopic($f, $title, $text, $sticky, $user, $uri)
    {
        $ts = time();

        $sticky = $sticky ? $ts : 0;

        // get when
        if (!($when = $this->getOne("SELECT `when` FROM " . TF_FORUM_TOPIC . " order by `topic_id` desc limit 1;")))
        {
            return false;
        }
	if ($when == $ts) {
	    return false;
	}

        // add topic title
        if (!$this->query("INSERT INTO" . TF_FORUM_TOPIC . " SET `topic_posts` = 1, `forum_id` = ?, `topic_title` = ?, `when` = ?, `first_post_user` = ?, `first_post_when` = ?, `last_post_user` = ?, `last_post_when` = ?, `topic_sticky` = ?, `topic_uri` = ?",
            [
                $f,
                $title,
                $ts,
                $user,
                $ts,
                $user,
                $ts,
                $sticky,
                $uri
            ])
        ) {
            return false;
        }


        // get topic_id
        if (!($topic_id = $this->getOne("SELECT LAST_INSERT_ID();")))
        {
            return false;
        }

Take it, it's free! But I don't think it will help many websites.