ftell Tells file pointer read/write position intftell resourcehandle Returns the position of the file pointer referenced by handle; 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 popen. ftell gives undefined results for append-only streams (opened with "a" flag). ]]> See also fopen, popen, fseek, and rewind.