/**
  * Data URI scheme - base64 encoding.
  *
  * @param string $sFile
  * @return string Returns format: data:[<MIME-type>][;base64],<data>
  */
 public static function dataUri($sFile)
 {
     $oFile = new \PH7\Framework\File\File();
     // Switch to right MIME-type
     $sExt = $oFile->getFileExt($sFile);
     $sMimeType = $oFile->getMimeType($sExt);
     unset($oFile);
     $sBase64 = base64_encode(file_get_contents($sFile));
     return "data:{$sMimeType};base64,{$sBase64}";
 }