PHP ftell() Function Usage and Example

PHP Filesystem Reference Manual

The ftell() function can return the current position in the opened file. It returns the current file pointer position on success, and false on failure.

Syntax

int ftell ( resource $handle )

This function can return the position of the file pointer referenced by the handle, which means its offset in the file stream.

Example1

<?php
　　　$file = fopen("/PhpProject/sample.txt, "r");
　　　//Print Current Position
　　　echo ftell($file);
　　　//Change Current Position
　　　fseek($file, "10");
　　　//Print Current Position Again
　　　echo "\n" . ftell($file);
　　　fclose($file);
?>

Output Result

0
10

Example2

<?php
　　　//Open File and Read Data
　　　$file = fopen("/PhpProject/sample.txt, "r");
　　　$data = fgets($file,　7);
　　　echo ftell($file);　
　　　fclose($file);
?>

Output Result

6

PHP Filesystem Reference Manual