(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)
ftell -- Tells file pointer read/write position
Returns the position of the file pointer referenced by fp; i.e.,
its offset into the file stream.
If an error occurs, returns FALSE.
The file pointer must be valid, and must point to a file
successfully opened by fopen() or
See also fopen(), popen(),
fseek() and rewind().