php中如何实现在线网友_PHP

$time=getdate();

$tt=$time[year]*365*24*60+$time[mon]*30*24*60+$time[mday]*24*60+$time[hours]*60+$time[minutes];

if($userid!="guest"){

$SQLqq="UPDATE $USER_ATTR_TABLE SET time=$tt,status=1 WHERE userid='$userid'";

mysql_query($SQLqq);}

$SQLq="SELECT status,userid,time FROM $USER_ATTR_TABLE WHERE status=1;";

$resultq=mysql_query($SQLq) or die(mysql_error());

$countq=mysql_numrows($resultq);

for ($ii=0;$ii<$countq;$ii++) {

$rowq=mysql_fetch_Array($resultq);

$useridq=$rowq[userid];

$times=$rowq[time];

$ts=$tt-$times;

if($ts>=15)

{

$sqls="UPDATE $USER_ATTR_TABLE SET status=0 WHERE userid='$useridq'";

mysql_query($sqls);

}

}

?>

我把代码写下来，剩下的就看你们自己的了：）