ช่วยดูให้หน่อยครับ พออัพโหลดรูปภาพไป โดยที่รูปภาพไม่เกิน 512 k แล้วทำไมมันไปเงื่อนไข else

if ($fileupload) {

	$array_last=explode(".",$fileupload_name);
	$c=count($array_last)-1; 
	$lastname=strtolower($array_last[$c]) ;
	
	if ($lastname=="gif" or $lastname=="jpg" or $lastname=="jpeg" or $lastname=="png") {

		$sql2="select max(id_slider) from slider ";
		$result2=mysql_db_query($dbname,$sql2);
		$row=mysql_fetch_row($result2);

		$photoname=$name.".".$lastname;
		copy($fileupload,"images/slideshow/".$photoname);

		$sql3="update slider set name_slider='$photoname' where id_slider ='$row[0]' ";
		$result3=mysql_db_query($dbname,$sql3);

	} 
	unlink($fileupload);
}

<?php 
include"chkbrowser.php"; 
$name=$_POST[name];
$title=$_POST[title];
$fileupload=$_FILES['fileupload']['tmp_name'];
$fileupload_name=$_FILES['fileupload']['name'];
$fileupload_size=$_FILES['fileupload']['size'];
$fileupload_type=$_FILES['fileupload']['type'];

$sql="insert into slider values('','','$title')";
$result=mysql_db_query($dbname,$sql);

if ($fileupload) {

	$array_last=explode(".",$fileupload_name);
	$c=count($array_last)-1; 
	$lastname=strtolower($array_last[$c]) ;
	
	if ($lastname=="gif" or $lastname=="jpg" or $lastname=="jpeg" or $lastname=="png") {

		$sql2="select max(id_slider) from slider ";
		$result2=mysql_db_query($dbname,$sql2);
		$row=mysql_fetch_row($result2);

		$photoname=$name.".".$lastname;
		copy($fileupload,"images/slideshow/".$photoname);

		$sql3="update slider set name_slider='$photoname' where id_slider ='$row[0]' ";
		$result3=mysql_db_query($dbname,$sql3);

                if ($result&$result3) {
	             echo "<script>alert(' Upload Finish ');</script>";
	             echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0.1;URL=admin_slider.php\">"; exit();
                } else {
	
	              $sql4="select max(id_slider) from slider ";
	              $result4=mysql_db_query($dbname,$sql4);
	              $row2=mysql_fetch_row($result4);
	
	              $sql5="delete from slider where id_slider='$row2[0]' ";
	              $result5=mysql_db_query($dbname,$sql5);
	
	             echo "<script>alert(' Error Picture over 512 K. ');</script>"; 
	             echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0.1;URL=admin_slider.php\">"; exit();
                 }

	} 
	unlink($fileupload);
} 

mysql_close(); 

?>