Getting Started with PHP5: Reading and Writing Text Files

===============
写文件
===============
$realFiePath = "D:/test.txt";
$fileContent = "Test 2011 03 12.";

$file = fopen($realFiePath, 'wb');
fwrite($file, $fileContent );
fclose($file);

===============
读文件
===============
$realFiePath = "D:/test.txt";
$size = intval(sprintf("%u", filesize($realFiePath)));
$handle = fopen($realFiePath, "rb");
$fileContent = "";
  while (!feof($handle)) {
      $fileContent .= fread($handle, $size);
      ob_flush();
      flush();
  }
  fclose($handle);

echo $fileContent ;