ftell in PHP

ftell — Returns the current position of the file read/write pointer
Syntax:

int ftell ( resource $handle )
Returns the position of the file pointer referenced by handle.

Parameters:

handle
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).

Return values: 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.

Note: Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results for files which are larger than 2GB.


Example #1 ftell() example

<?php

// opens a file and read some data
$fp = fopen("/etc/passwd", "r");
$data = fgets($fp, 12);

// where are we ?
echo ftell($fp); // 11

fclose($fp);

?>