title: Any reliable method to rotate uploaded pictures in the right direction?
body: <p>Some times ago i wrote a method to read out the EXIF-data from a uploaded picture in a online-community. After i got the orientation from the picture, i rotated the file in the right direction. Only a short part from my script:</p>
  
  <pre><code>public function rotate($sourceFile, $targetFile, $orienation)
  {
      switch($orienation){
          case 3: $degrees = '180'; break;
          case 6: $degrees = '90'; break;
          case 8: $degrees = '270'; break;
          default: $degrees = '0';
      }
  
      $file = $sourceFile . DS . $targetFile;
      $rotate = GlobalConfig::BIN_IMAGICK_CONVERT . ' -rotate ' . $degrees . ' ' . $file . ' ' . $file;
      exec($rotate);
  }
  </code></pre>
  
  <p>My script is working. But my question is, how other big guys like
  facebook, handle the rotation from uploaded pictures? Because my solution is certainly not the best.</p>