readfile and fopen problems

[fnbcprog]

I am working in a environment dealing with all sorts of files that need to be open from a central location dynamically??

I have posted the code below so you can see where I am coming from.... The problem I am having is the SQL to update the log table somehow is being execute twice in this script.

I have looked all over the place and cannot find one solution.

Here is the code:

function show_file($id_document="",$filename="",$method) {
	global $cfg,$__CONNECTION,$data;

// Retrieve filename from database if id_document is sent to function
if( isset($id_document) ) {
	$sql = "SELECT filename FROM ". TBL_LIB ." WHERE id_subacct=". $data['id_subacct'] ." AND id_document = '". $id_document ."'";
	$__CONNECTION->query($sql);
	$num_docs = $__CONNECTION->get_num_rows();
	unset($sql);

	// Check to see if valid document
	if( $num_docs == 1 ) {
		$row = $__CONNECTION->get_fetch_array();
		$filename = $row['filename'];	
	} else {
		header("Location: ". PAGE_ERROR_LIBRARY . "?errorno=1007");
		exit();
	}
}
// **************************************
            // PROBLEM HERE
            // **************************************
// Increment Number of Times Opened Field
$sql = "INSERT INTO ". TBL_LOG_DOC ." (id_subacct,id_document,opened) VALUES (".$data['id_subacct'].",".$id_document.",now());";
$__CONNECTION->query($sql);
unset($sql);

if( file_exists($cfg['file_path'].$filename) ) {
	// Set headers
	header('Content-Length: '.filesize($cfg['file_path'].$filename));
	//header('Content-Transfer-Encoding: binary');

	// Get filetype
	$filetype = get_filetype($filename);
	if( array_key_exists($filetype,$cfg['content_type']) ) {
		header('Content-Type: '.$cfg['content_type'][$filetype]);
	}
	else {
		header('Content-Type: application/force-download');
	}

	//header('Referer: '.PAGE_LIBRARY);		
	switch($method) {
		case "view":
			header('Content-Disposition: inline; filename="' . $filename . '"');
			break; 
		case "download":
			header('Content-Disposition: attachment; filename="' . $filename . '"');
			break;
		default:
			header('Content-Disposition: filename="' . $filename . '"');
			break;
	}

	// Open the file
	$buffer = "";
	$handle = fopen($cfg['file_path'].$filename,"r");
	while( !feof($handle) ) {
		$buffer .= fread($handle,filesize($cfg['file_path'].$filename));			
	}
	fclose($handle);
	echo $buffer;
	//readfile($cfg['file_path'].$filename);	
	exit();
} else {
	header('Location: '.PAGE_ERROR_LIBRARY.'?errorno=1007');
	exit();
}
return;
}