Mysql_close (): the provided argument is not a valid MySQL-Link resource

Question

I am trying to use custom session handlers to store session data in a MySQL database. However, I continue to receive the following warning:

mysql_close(): supplied argument is not a valid MySQL-Link resource

Here is the code I use that I got from here :

function _open(){

    global $_sess_db;
    $_sess_db = mysql_connect("localhost", "root", "******");
    if ($_sess_db) {
        return mysql_select_db('style', $_sess_db);
    }
    return false;
}

function _close(){
    global $_sess_db;
    return mysql_close($_sess_db); //error happens here
}

The full text of the error message ultimately points to the final "return mysql_close ($ _ sess_db);" line. I can confirm that the mysql_connect information really works, and I also have the rest of the session handler functions.

And in case this helps, I immediately get these errors when loading the page, without actually calling any functions of the session handler and not opening any current sessions.

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Answer 1

- . global , . $GLOBALS ['_ sess_db'] $_sess_db .

Answer 2

_open() _close() , , , .