upload immagini

[dttah]

                             if(file_exists($upload_dir.$file_name)){
                                  //$file_name assegnato dai dati del form...                                 
                                   //$file_name e' img.jpg
                                list($nome,$type) = explode('.',$file_name);
                                 $file_name = $nome.uniqid().'.'.$type;
                              if (move_uploaded_file($file_tmp,$upload_dir.$file_name)) {
                                       echo "<font color=\"#FF0000\">File $i: ($file_name) Uploaded.
</font>";
                                       echo"
";
                                       echo"<a href=\"http://www.oplayers.net/public/upload/images/$file_name\"><img src=\"http://www.oplayers.net/public/upload/images/$file_name\" width=\"119\" height=\"119\" border=\"2\"></a>";
                                       echo"

";
                                       echo "link html: <input name=\"textfield\" value=\"&lt;img src=&quot;[url]http://www.oplayers.net/public/upload/images/[/url]$file_name&quot;&gt;\" size=\"100\">";
                                       echo"
";
                                       echo"link diretto:<input name=\"textfield\" value=\"http://www.oplayers.net/public/upload/images/$file_name\" size=\"100\">";
                                       echo"
";
                                       echo"Thumbnail:<input name=\"textfield\" type=\"text\" value=\"&lt;a href=&quot;[url]http://www.oplayers.net/public/upload/images/[/url]$file_name&quot;&gt;&lt;img src=&quot;[url]http://www.oplayers.net/public/upload/images/[/url]$file_name&quot; width=&quot;119&quot; height=&quot;119&quot; border=&quot;2&quot;&gt;&lt;/a&gt;\" size=\"100\">

";
                                       }
                             }else{
                                   #-----------------------------------------------------------#
                                   # this function will upload the files.  :) ;) cool          #
                                   #-----------------------------------------------------------#
                                   if (move_uploaded_file($file_tmp,$upload_dir.$file_name)) {
                                       echo "<font color=\"#FF0000\">File $i: ($file_name) Uploaded.
</font>";
                                       echo"
";
                                       echo"<a href=\"http://www.oplayers.net/public/upload/images/$file_name\"><img src=\"http://www.oplayers.net/public/upload/images/$file_name\" width=\"119\" height=\"119\" border=\"2\"></a>";
                                       echo"

";
                                       echo "link html: <input name=\"textfield\" value=\"&lt;img src=&quot;[url]http://www.oplayers.net/public/upload/images/[/url]$file_name&quot;&gt;\" size=\"100\">";
                                       echo"
";
                                       echo"link diretto:<input name=\"textfield\" value=\"http://www.oplayers.net/public/upload/images/$file_name\" size=\"100\">";
                                       echo"
";
                                       echo"Thumbnail:<input name=\"textfield\" type=\"text\" value=\"&lt;a href=&quot;[url]http://www.oplayers.net/public/upload/images/[/url]$file_name&quot;&gt;&lt;img src=&quot;[url]http://www.oplayers.net/public/upload/images/[/url]$file_name&quot; width=&quot;119&quot; height=&quot;119&quot; border=&quot;2&quot;&gt;&lt;/a&gt;\" size=\"100\">

";
                                                                          }else{
                                        echo "File $i: Faild to upload.
";
                                   } 

in questo modo me li sovrascrive dove sbaglio?