Write to and read from file in PHP

<?php/*from   w  w w.j ava2  s .  c  o m*/
  // open file for writing
  $filename = "test.txt";

  if(!($myFile = fopen($filename, "w")))
  {
    print("Error: ");
    print("'$filename' could not be created\n");
    exit;
  }

  //write some lines to the file
  fputs($myFile, "Save this line for later\n");
  fputs($myFile, "Save this line too\n");

  //close the file
  fclose($myFile);

  // open file for reading
  if(!($myFile = fopen($filename, "r")))
  {
    print("Error:");
    print("'$filename' could not be read\n");
    exit;
  }

  while(!feof($myFile))
  {
    //read a line from the file
    $myLine = fgets($myFile, 255);
    print("$myLine<br>\n");
  }

  //close the file
  fclose($myFile);
?>