Multiple database + pconnect issues

[eluser]Nanodeath[/eluser]
Hmm...I think any function with any sort of complexity should be avoided at all costs, if we're to keep queries efficient. Here's another idea, with my discovery of the mysql_thread_id function (PHP 4.3.0):

Code:

function db_pconnect(){
    $ret = @mysql_pconnect($this->hostname, $this->username, $this->password);
    if($ret){
        $this->_thread_id = mysql_thread_id($ret);
    }
    return $ret;
}

var $_thread_id = FALSE;

function db_select(){
    static $selected_db = array();
    if($this->_thread_id !== FALSE) {
        if(array_key_exists($this->_thread_id, $selected_db) && $selected_db[$this->_thread_id] == $this->database){
            return TRUE;
        }        
        $selected_db[$this->_thread_id] = $this->database;
    }
    return @mysql_select_db($this->database, $this->conn_id);
}

This feels like a coding duel for some reason