feof

The feof function tests if a file pointer has reached end of file (EOF).

This example demonstrates by making a dummy read, which places the pointer at the end of the file. The result of feof is then true.

{{code:php $f = fopen('/path/to/foobar', 'r'); fread($f);

var_export( feof($f) );
//=> true

fclose($f);

}}

In Ruby, the File#eof instance method works the same way.

{{code:ruby File.open('/path/to/foobar', 'r') do |f| f.read

  p f.eof
  #=> true
end

}}

The File#eof instance method is also aliased as File#eof?. It's a common Ruby idiom for methods that return boolean be written like this, as if asking a question.

Both File#eof and File#eof? are commonly used, so choose the one that is most expressive for your usage.