I am having problems getting write to to the guestbook.txt. I have read write and execute permission for the guestbook.txt. Can someone help me? Strict//EN"...

I am having problems getting write to to the guestbook.txt. I have read write and execute permission for the guestbook.txt. Can someone help me? Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> Sign Guest Book content="text/html; charset=iso-8859-1" /> if (empty($_GET['first_ name']) || empty($_GET['last name'])) echo "You must enter your first and last name! Click your browser's Back button to return to the Guestbook."; else { $First Name = add slashes($_GET['first name']); $Last Name add slashes($_GET['last name']); $Guestbook = open("guestbook.txt", "a"); if (is writable("guestbook.txt")) { if (write($Guestbook, $Last Name . ", " . $First Name. "\n")) echo "

Thank you for signing our guest book!

"; else echo "

Cannot add your name to the guest book.

";} else echo "

Cannot write to the file.

"; close($Guestbook)?> Show Guest Book

Guest Book Enter your name to sign our guest book

First Name

Last Name

Show Guest Book