也谈php网站在线人数统计

{     
$olnum = array();     
$conn = connect();     
$stmt = "SELECT COUNT(UserID) FROM ".DB_NAME.".USER WHERE IsOnline='Y' AND    

UserGroupID != 4"; //4 为guest的用户组id     
//info ($stmt);     
$result = query($stmt,$conn);     
$olnum['user'] = result($result,0,"COUNT(UserID)");     
$stmt = "SELECT COUNT(TempID) FROM ".DB_NAME.".TEMPUSER";     
//info ($stmt);     
$result = query($stmt,$conn);     
if ($row = fetch_array($result))     
{     
$olnum['guest'] = $row['COUNT(TempID)'];     
}     
disconnect($conn);     
return $olnum; //from www.w3sky.com    
}     

     

其中的connect(), disconnect(), query(),fetch_array()函数在dbmanager.inc.PHP中     
dbmanager.inc.PHP     

define("DB_NAME","databasename");     
define("DB_USER","user");     
define("DB_PASS","pass");     
define("DB_HOST","localhost");     

function connect()     
{     
//echo "Connecting to Host:".HOST."<br>";     
$conn = mysql_connect(DB_HOST,DB_USER,DB_PASS);     
mysql_select_db(DB_NAME);     
/*    
if ($conn)    
{    
echo "Connect to database sucessfully. connection id:".$conn."<br>";    
}    
else    
{    
echo "Connect to database failed.<br>";    
}    
*/     
return $conn;     
}     

function pconnect()     
{     
return mysql_pconnect(DB_HOST,DB_USER,DB_PASS);     
}     

function disconnect($conn)     
{     
$close = mysql_close($conn);