ftell

  • We use PHP’s ftell function to return the current position of a file pointer.

    PHP

    $f = fopen('/path/to/foobar', 'r');
fseek($f, 2);
print ftell($f);
//=> 2
fclose($f);

    The File#tell instance method works exactly the same way.

    Ruby

    File.open('/path/to/foobar', 'r') do |f|
  f.seek 2
  puts f.tell
  #=> 2
end

    Ruby IO objects also provide the aliases pos and pos= for working with the file pointer’s position. It’s a common Ruby idiom to use these instead of seek and tell, but you’ll find both are widely used.

    Ruby

    File.open('/path/to/foobar', 'r') do |f|
  f.pos = 2
  puts f.pos
  #=> 2
end

    see also

← fstat ftruncate →

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