int ftell ( resource $handle )

<?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);
?>

0
10

<?php
   // opens a file and read data
   file = fopen("/PhpProject/sample.txt", "r");data = fgets(file, 7);

   echo ftell(file); 
   fclose($file);
?>

6