PHP - Chmod Questions..

I'm having a problem setting file permissions. Can someone give a little guidance.


if(is_uploaded_file($_FILES['file']['tmp_name'])){
           move_uploaded_file($_FILES['file']['tmp_name'],$uploaddir.'/'.$_FILES['file']['name']);
           chmod($_FILES['file']['tmp_name'],0777);



The permissions are not being set ? I made sure the dir was chmod correct. 

Thanks

Code: [Select]
$url = 'http://gdata.youtube.com/feeds/api/playlists/blabla';
$fp = fopen($url, 'r');
$buffer='';
if ($fp) {
while (!feof($fp))
$buffer .= fgets($fp, 1024);
fclose($fp);
$buff=stripslashes($buffer);
$old = umask(0);
file_put_contents("si.xml", $buff);
chmod("si.xml", 0777);
umask($old);
The warnings I get are

Code: [Select]
Warning: file_put_contents(si.xml) [function.file-put-contents]: failed to open stream
Warning: chmod() [function.chmod]: Permission denied

I've even manually set entire directory file permissions to 777, but no use.
Am using filezilla on windows

I need to set my script here to change the CHMOD settings to 644.  The images that are uploaded into the Yahoo server are not able to be accessed.  I believe this is the CHMOD, however I have never worked with CHMOD.  Please help, or if you notice an error in my coding please let me know.

Code: [Select]
<?php


$Name = $_POST['Name'];
$Pic = $_FILES["file"] ["name"];

if ((($_FILES["file"] ["type"] == "image/gif")
    || ($_FILES["file"] ["type"] == "image/jpeg")
    || ($_FILES["file"] ["type"] == "image/pjpeg"))
    && ($_FILES["file"] ["size"] < 100000))
      {
      if ($_FILES["file"] ["error"] > 0)
        {
     echo "Return Code: " . $_FILES["file"] ["error"] . "<br />";
     }
      else
        {
    
     if (file_exists("../Graphics/" . $_FILES["file"] ["name"]))
       {
  
  include("../Admin/photos.php");
  
       echo $_FILES["file"] ["name"] . " already exists. ";
       }
     else
       {          

       move_uploaded_file($_FILES["file"] ["tmp_name"],
       "../Graphics/" . $_FILES["file"] ["name"]);

          chmod("$pic",0644);
  
      }
      }
    }
  else
      {
  
       echo "<font size='5' face='Arial'><b>Invalid file</b></font>";
      }

  $Category = $_POST['Category'];

              include('database.php');

                  mysql_select_db("bluemoonmastiff", $con);
                
                  $good_data = $_POST;
                  
                  foreach($good_data as $field => $value)
                  {
                    if($field != "submitted")
                 {
                    $field_array[] = $field;
                    $clean = strip_tags(trim($value));
                    $escaped = mysqli_real_escape_string($cxn,$clean);
                    $value_array[] = $escaped;
                 }
                  }
                  
                  $fields = implode(",",$field_array);
                  $values = implode('","',$value_array);

                  $sql = "INSERT INTO gallery SET Name='$Name',PicAddress='Graphics/$Pic',Category='$Category'";
                  
                   if (!mysql_query($sql,$con))
  {
  die('Error: ' . mysql_error());
  }

 

echo "<font size='5' face='Arial'><b>Picture Upload Complete</b></font>";

?>