PHP 求图片大小异常

我想把一个图片,插入到数据库表中,表中对应的图片字段为BLOB型.
代码 <?php
//$picture="e:\\pic\\4.txt";

$picture="e:\\pic\\9.jpg";
echo "$picture";
$psize=filesize($picture);
echo "$psize";
$mysqlpicture=addslashes(fread(fopen($picture,"r"),$psize));
echo "$mysqlpicture";
unlink($picture);
$host="localhost";
$user="root";
$password="123456";
$database="teacher";
$table_name="student";
$conn=mysql_connect($host,$user,$password);
if(!mysql_connect($host,$user,$password))
die("connect erroring..... ".mysql_error());
mysql_select_db($database,$conn);
mysql_query("SET NAMES 'GB2312'");
mysql_query("insert into student (pic) values ('$mysqlpicture')") or die("cant't perform insert");

?>
此代码能实现文本文件的插入到数据库中,却不能实现小的图片插入到数据当中,
异常:
Warning: filesize() [function.filesize]: stat failed for e:\pic\9.jpg in D:\AppServ\www\b.php on line 6


图片大小为5KB.



请高手指点.