用PHP3作树型目录

<? function style(){
   echo"<style>";
   echo"<!--";
   echo"a{font-size:9pt;color:blue}";
   echo"-->";
   echo"</style>";
   }
function GetMessages($msgStart,$number,$type){
  $conn=mysql_connect("localhost","207","");
  mysql_select_db("test");
  $sql="select*from message where fatheird=-1 and type=";
  $sql=$sql.$type;
  $sql=$sql."order by time desc LIMIT ";
  $sql=$sql.$msgStart;
  $sql=$sql.",";
  $sql=$sql.$number;
  $result= mysql_query($sql,$conn);
  if(!$result){
  mysql_close($conn);
  $msgs[0]=0;
  return $msgs;
  }
  $count=0;
  while ($obj=mysql_fetch_object($result)){
  $count++;
  $msgs[$count]=$obj;
}
  $msgs[0]=$count;
  mysql_close($conn);
  return $msgs;
  }
  function InsertMessage($msg){
  if(!(($msg["title"])&&($msg["author"])&&($msg["time"]))){
  return 0;
  exit;
  }
  $conn=mysql_connect("localhost","207","");
  mysql_select_db("test");
  $sql="insert into message(title,body,author,fatherid,time,type)values('";
  $sql=$sql.getsafestring($msg["title"]);
  $sql=$sql."','";
  $sql=$sql.getsafestring($msg["body"]);
  $sql=$sql."','";
  $sql=$sql.$msg["author"];
  $sql=$sql."',";
  $sql=$sql.$msg["fatherid"];
  $sql=$sql.",'";
  $sql=$sql.$msg["time"];
  $sql=$sql."',";
  $sql=$sql.$msg["type"];
  $sql=$sql.")";
  $result=mysql_query($sql,$conn);
  mysql_close($conn);
  return $result;
}
function getmessagebyfather($fatherid){
$conn=mysql_connect("localhost","207","");
mysql_select_db("test");
$sql="select*from message where fatherid=";
$sql=$sql.$fatherid;
$sql=$sql."order by time desc";
$result=mysql_query($sql,$conn);
if(!$result){
mysql_close($conn);
$msgs[0]=0;
return $msgs;
}
$count=0;
while($obj=mysql_fetch_object($result)){
$count++;
$msgs[$count]=$obj;
$msgs[$count]->child=getmessagebyfather($obj->id);
}
$msgs[0]=$count;
return $msgs;
}
$count=0;
while ($obj=mysql_fetch_object($result)){
$count++;
$msgs[$count]=$obj;
$msgs[$count]->child=getmessagebyfather($obj->id);
}
$msgs[0]=$count;
return $msgs;
}
function getmsgcount($type){
   $conn=mysql_connect("localhost","207","");
   mysql_select_db("test");
   $sql="select count(*)from message where fatherid=-1 and type=";
   $sql=$sql.$type;
   $result=mysql_query($sql,$conn);
   $count=mysql_result($result,0);
   mysql_colse($conn);
   return $count;
}
function getmessagebyid($id){
   $conn=mysql_connect("localhost","207","");
   mysql_select_db("test");
   $sql="select*from messgae where id=".$id;
   $result=mysql_query($sql,$conn);
   if(!$result)
    return 0;
}
  $obj=mysql_fetch_object($result);
  mysql_colse($conn);
  return $obj;
}
  function getsafestring($string){
  $string=str_replace("<","<",$string);
  $string=str_replace(">",">",$string);
  $string=str_replace("'","",$string);
  $string=str_replace("\n","<br>",$string);
  $string=str_replace(" ","",$string);
  return $string
}

<?
require("/commonfuncs.php3");
require("home/websrc/userfuncs.php3");
function makeloginform(){
   echo"Please login first<br>";
   echo"<form action+";
echo $GLOBALS["PHP_SELF"];

if(!$HTTP_COOKKIE_VARS["UserID"]){
   if(!$UserName){
    makeloginform();
    exit;
   }
  if(!$userinfo=getuserbyname($UserName))){
   echo "Login Name Error!";
   exit;
}
   if($userinfo->password!=$Password){
     echo "Login Password Error!";
     exit;
}
  $conn=DBConnect();
  $sql="insert into useronline(uid,logintime,username)values(";
  $sql=$sql.$userinfo->name;
  $sql=$sql."')";
  mysql_query($sql,$conn);
  DBClose($conn);
  if(!(setcookie("UserID",$userinfo->id,"","/"))){
   echo"Set Cookie Error!!";
   exit;
   }
   $strHeader="Location:".$PHP_SELF;
   header($strHeader);
   exit;
   }
  ?>

原文转自：http://www.ltesting.net