用PHP3作树型目录(1)-PHP教程,PHP应用

<? 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
}