(PHP 4, PHP 5)
ftell — Returns the current position of the file read/write pointer
Returns the position of the file pointer referenced by handle.
Returns the position of the file pointer referenced by handle as an integer; i.e., its offset into the file stream.
If an error occurs, returns FALSE.
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