note 7189 deleted from function.unlink by nicos

Win32 builds of php do not have the funciton unlink() because unlink is grouped with other functions that are only compiled into PHP if the operating system in use supports symbolic links - this is an error, since unlink() is the system function used under win32 to delete files. You can recompile PHP to allow unlink() to be called under Win32 by modifying a few lines in link.h, php_link.h, and link.c (all you really have to do is move #endif and swap a few lines)