fwrite is adding extra text, why? and where is it coming from????

I an using the fwrite command to show how it works but it is writing extra data. For example, I have a Form text box that prompts for a new string of data then on submit it writes this to the text file and for just a test I wrote "this is a test" and I got the text below. I don't understand why?? this is a testy> </html> / / DTD HTML I put a space between the two slashes otherwise Outlook puts a "file:" in front of it like this // Here is a snippet of my code for performing the write, there is enough here show you my approach. print "<form name=myform action=fileio.php>"; $filename="c:\\Program Files\\Apache Group\\Apache\\htdocs\\testfile.txt"; $fp=fopen($filename, "r+"); if (!empty($newText)){ fwrite($fp, $newText); fclose($fp); $fp=fopen($filename, "r+"); $contents=fread($fp, filesize($filename)); }else { $contents=fread($fp, filesize($filename)); } fclose($fp); print "The content of the file is: <p><b>".nl2br($contents)."</b>"; print "<br><p>Enter some text to write to the file.<br>"; print "<input type=text name=newText size=30><br>"; print "<input type=submit value='write text'>"; Note: I know I probably shouldn't write to a file and then reopen it, but I am trying to demonstrate that I am actually reading and writing so I didn't want to cheat and say I was actually reading it when I wasn't. The resulting text always has the "testy> </html> // DTD HTML " text appended after it. (???????)