using the following lines of code:

  $fd=fopen("$file1","r") || die ("Internal Error\n");
  $content=fread($fd,filesize($file1));
  echo "$content</br>";
  fclose("$fd");

  $fh=fopen("$file2","r") || die ("Internal Error\n");
11  $content=fread($fh,filesize($file2));
  echo "$content</br>";
13  fclose($fh);

results in:
Text from file1 

Warning: Unable to find file identifier 1 in /usr/local/htdocs/test.php3 on line 11

Warning: Unable to find file identifier 1 in /usr/local/htdocs/test.php3 on line 13