<?php

    function track_logins($vars) {
        mysql_query("INSERT INTO tbllogins (clientid, ipaddr) VALUES ('". $vars['userid'] ."', '". $_SERVER['REMOTE_ADDR'] ."')") or die(mysql_error());

        // Trim logins to 30 latest
        mysql_query("DELETE FROM tbllogins WHERE clientid = '". $vars['userid'] ."' AND date NOT IN (SELECT * FROM (SELECT date FROM tbllogins WHERE clientid = '". $vars['userid'] ."' ORDER BY date DESC LIMIT 30) alias)");

    }

    add_hook("ClientLogin",1,"track_logins");

?>