getting pdf from mssql error on some documents

[fayne]

Hello,

 

I have a page where users can insert pdf-document into my mssql database.

The selected pdf get converted with the following lines and then inserted into a image column in my mssql database.

$filename = $_FILES["pdf"]["tmp_name"]; 
$datastring = file_get_contents($filename; 
$arrdata = unpack("H*hex", $datastring); 
$content = "0x".$arrdata['hex'];

Now on another page the user can view the pdf they inserted into the database with the following code;

$query = odbc_exec($conn, "SELECT name, size, type, document FROM documents WHERE id='". $id ."'");
while (odbc_fetch_row($query)) {
	$filename = odbc_result($query,"name");
	$filesize = odbc_result($query,"size");
	$filetype = odbc_result($query,"type");
	$filedata = odbc_result($query,"document ");
	
	header("Content-Length: ". $filesize ."");
	header("Content-Type: ". $filetype ."");
	header("Content-Disposition: attachment; filename=". $filename ."");
	echo $filedata;
}

This is all working perfectly with pdf files below 500kb.

But once a pdf document exceeds the 500kb I get an error downloading the pdf file with the above script.

And the pdf-document gets inserted right because from my vb.net tool I still can open the pdf-document from the mssql database.

 

Is there some kind of limit in php that when a file exceeds 500kb he won't show/download it?

Can someone explain me how I can adjust this so that pdf documents that are bigger then 500kb still can be opened from the php page?