Write a chat room with PHP and access (vi)

LEAVE.PHP3:
<?php
$ConnID = @odbc_connect ("Jtfcht", "admin", "");
if ($ConnID) {
if (!) ( $id = = "1" && $ps = "Superldz")) {
$result = @odbc_exec ($ConnID, "SELECT username,password,roomid,sex from User WHERE userid=". $id);
if (@odbc_fetch_into ($result,0,& $rArr)) {
if ($RARR [1]== $ps)
if ($RARR [3])
@odbc_exec ($ConnID, INSERT into Chtcont (Sidfrom, Snamefrom, Sipfrom, Sidto, Snameto, Stime, Scont, Bsecret, Roomid) VALUE S (". $id.", ' ". $RARR [0]." ', ' ". getenv (" REMOTE_ADDR ")." ', 0, ' Everybody ', ' ". Date (" H:i:s ")." ', ' <font color=gray> ' system messages ' <font color= #FF9933 > ". $RARR [0]." </font> left this chat room </font> ', False, '. $RARR [2]. ");
Else
@odbc_exec ($ConnID, INSERT into Chtcont (Sidfrom, Snamefrom, Sipfrom, Sidto, Snameto, Stime, Scont, Bsecret, Roomid) VALUE S (". $id.", ' ". $RARR [0]." ', ' ". getenv (" REMOTE_ADDR ")." ', 0, ' Everybody ', ' ". Date (" H:i:s ")." ', ' <font color=gray> ' system messages ' <font color= #3399FF > ". $RARR [0]." </font> left this chat room </font> ', False, '. $RARR [2]. ");
}
@odbc_exec ($ConnID, "UPDATE User SET roomid=0,toid=0,toname=", secret=false,firsttime=false,lsttime=0,lastloc=0 WHERE userid= ". $id);
}
@odbc_close ($ConnID);
}
Header ("Location:.");
?>