php中如何實現在線網友

<?
$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); } }?>我把代碼寫下來,剩下的就看你們自己的瞭:) 不明白的地方可以提問 我常在這裡的:)

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