ftell

(PHP 4, PHP 5, PHP 7, PHP 8)

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

Description

ftell(resource $stream): int|false

Returns the position of the file pointer referenced by stream.

Parameters

stream

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 stream 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.

Examples

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);

?>

See Also

  • fopen() - Opens file or URL
  • popen() - Opens process file pointer
  • fseek() - Seeks on a file pointer
  • rewind() - Rewind the position of a file pointer