Hiya

run this test script and and watch the output differ depending on using filesize or not

	$fp = fopen('file.test', "a+b");
	
	//(un)comment this line
	filesize('file.test');
	
	fwrite($fp, "boe");
	fclose($fp);

	$fp2 = fopen('file.test', "a+b");
	fseek($fp2, 0);
	echo fread($fp2, filesize('file.test'));

	unlink('file.test');

Greetz,

Wico