Downloader Function With PHP

Fungsi dibawah ini merupakan fungsi buatan untuk mendownload file dari remote HTTP ke local harddisk. Tentunya hanya file yang memiliki hak akses 0777 saja yang akan bisa didownload.

PHP Code:
define ("_MAX_DOWNLOAD_RATE", 20.5*1024); //20kb / second
define ("_DOWNLOAD", "D:/down-test/");
function putItNow($file_source, $file_target)
{
  // Preparations
  $file_source = str_replace(' ', '%20', html_entity_decode($file_source)); // fix url format
  if (file_exists($file_target)) { chmod($file_target, 0777); } // add write permission

  // Begin transfer
  if (($rh = fopen($file_source, 'rb')) === FALSE) { return false; } // fopen() handles
  if (($wh = fopen($file_target, 'wb')) === FALSE) { return false; } // error messages.
  while (!feof($rh))
  {
    // unable to write to file, possibly because the harddrive has filled up
    if (fwrite($wh, fread($rh, round(_MAX_DOWNLOAD_RATE))) === FALSE) { fclose($rh); fclose($wh); return false; }
  }

  // Finished without errors
  fflush($rh);
  fflush($wh);
  return true;
}

if(isset($_POST['submit']) && !empty($_POST['source']))
{
    $target = _DOWNLOAD.basename($_POST['source']);
    if(putItNow($_POST['source'], $target))
    {
        echo "Download for = ".$_POST['source']." into $target was DONE successfully !!!";
    }
    else
    {
        echo "Unable to download = ".$_POST['source'];
    }   
}
?>

<h2>PHP DOWNLOADER

</h2>

<form action="" method="post">

<input name="source" type="text" size="20" />

<input name="submit" type="submit" value="download" />

</form>

<span class="fullpost">
</span>


diperlukan fungsi str_replace untuk menggantikan string %20 menjadi spasi. Sedangkan urutan download data na adalah:

1. fopen
2. fwrite
3. fread
4. fclose
5. fflush