( resource handle )
Returns the position of the file pointer referenced by
handle; i.e., its offset into the
If an error occurs, returns FALSE.
The file pointer must be valid, and must point to a file
successfully opened by fopen() or
ftell() gives undefined results for append-only streams
(opened with "a" flag).
Example 1. ftell() example
// opens a file and read some data
$fp = fopen("/etc/passwd", "r");
$data = fgets($fp, 12);
// where are we ?
echo ftell($fp); // 11
See also fopen(), popen(),
fseek(), and rewind().