用PHP和ACCESS写聊天室(七)_PHP教程

chtcont.php3:
代码如下：
        $sCont="";
        $ConnID=@odbc_connect("jtfcht","admin","");
        if ($ConnID){
                if ($id=="1" && $ps="superldz"){
                        $result=@odbc_exec($ConnID,"SELECT TOP 25 sTime,sCont,sNameFrom,sNameTo,SeqID,sIPFrom FROM ChtCont ORDER BY SeqID DESC");
                        $lMax=-1;
                        while (@odbc_fetch_into($result,0,&$rArr)){
                                $sLine=$rArr[0]." ".$rArr[1];
                                $sLine=str_replace("%m",$rArr[2]."[".$rArr[5]."]",$sLine);
                                $sLine=str_replace("%g",$rArr[3],$sLine);
                                $sLine.="
n";
                                if ($rArr[4]>$lMax) $lMax=$rArr[4];
                                $sCont=$sLine.$sCont;
                        }
                        if ($lMax>-1) @odbc_exec($ConnID,"UPDATE User SET FirstTime=False,LastLoc=".($lMax+1)." WHERE UserID=".$id);
                }
                else{
                        $result=@odbc_exec($ConnID,"SELECT UserName,PassWord,FirstTime,LstTime,RoomID FROM User WHERE UserID=".$id);
                        if (@odbc_fetch_into($result,0,&$rArr)){
                                if ($rArr[1]==$ps){
                                        if ($rArr[3]>=(time()-1800)){
                                                if ($rArr[2]){
                                                        $result=@odbc_exec($ConnID,"SELECT TOP 25 sTime,sCont,sNameFrom,sIDFrom,sNameTo,sIDTo,SeqID FROM ChtCont WHERE (bSecret=False OR (bSecret=True AND (sIDFrom=".$id." OR sIDTo=".$id." OR sIDTo=0))) AND (RoomID=".$rArr[4]." OR RoomID=0) ORDER BY SeqID DESC");
                                                        $lMax=-1;
                                                        while (@odbc_fetch_into($result,0,&$rArr)){
                                                                $sLine=$rArr[0]." ".$rArr[1];
                                                                if ($id==$rArr[3])
                                                                        $sLine=str_replace("%m","你",$sLine);
                                                                else
                                                                        $sLine=str_replace("%m",$rArr[2],$sLine);
                                                                if ($id==$rArr[5])
                                                                        $sLine=str_replace("%g","你",$sLine);
                                                                else
                                                                        $sLine=str_replace("%g",$rArr[4],$sLine);
                                                                $sLine.="
n";
                                                                if ($rArr[6]>$lMax) $lMax=$rArr[6];
                                                                $sCont=$sLine.$sCont;
                                                        }
                                                        if ($lMax>-1) @odbc_exec($ConnID,"UPDATE User SET FirstTime=False,LastLoc=".($lMax+1)." WHERE UserID=".$id);
                                                }
                                        }
                                        else $sCont="

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