Warning: Supplied argument is not a valid MySQL result resource in c:\apache\htdocs\upload\lihat.php on line 9

Warning: Supplied argument is not a valid MySQL result resource in c:\apache\htdocs\upload\lihat.php on line 10

Warning: Supplied argument is not a valid MySQL result resource in c:\apache\htdocs\upload\lihat.php on line 11

Warning: Supplied argument is not a valid MySQL result resource in c:\apache\htdocs\upload\lihat.php on line 12

Warning: Cannot add header information – headers already sent by (output started at c:\apache\htdocs\upload\lihat.php:9) in c:\apache\htdocs\upload\lihat.php on line 14

ni listingnya mohon pen cerahannya..

<?php
// connect to database
@mysql_connect("localhost","","") OR die ("Tidak Terkoneksi dengan Database");
@mysql_select_db("upload") OR die ("Terkoneksi Tapi Tidak Terhubung dengan Database Manapun");
//membuat tampilan. Tampilan berupa upload file. File yang kita upload akan disimpan ke database
echo "”;
echo “”;
echo ” “;
echo “”;
if($_POST[submit])
{
//variabel-variabel yang digunakan untuk menyimpan data-data mengenai file ke database
$file_name = $_FILES['file']['name'];
$tmp_name = $_FILES['file']['tmp_name'];
$file_size = $_FILES['file']['size'];
$file_type = $_FILES['file']['type'];
// membuka atau membongkar file
$fp = fopen($tmp_name, ‘r’);
// membaca isi dari file, membaca kode binarynya
$file_content = fread($fp, $file_size) or die(“Error: cannot read file”);
// menyimpan kode binarynya ke variabel, ini yang nanti akan kita simpan di database
$file_content = mysql_real_escape_string($file_content) or die(“Error: cannot read file”);
//menutup kembali filenya
fclose($fp);
// insert ke database
$qu = “INSERT INTO ‘file’
(‘file_content’,'file_name’,'file_type’,'file_size’)
VALUES
(‘$file_content’,'$file_name’,'$file_type’,'$file_size’)”;
$re = mysql_query($qu) or die (“insert gagal!”);
echo $file_name.”insert succes”;
// kode untuk menampilkan gambarnya.. lihat source code dari tampilkan.php
echo ” “;}
?>

tolong pencerahanya ni line 22 di komputer saya..

$file_content = mysql_real_escape_string($file_content) or die(“Error: cannot read file”);