original_string: protected function leadSWF()
  	{
  		$exif  = exif_imagetype($this->file);
  		$flash = ($exif === IMAGETYPE_SWF || $exif === IMAGETYPE_SWC);
  
  		if ($exif)
  		{
  			return $this->closeCase("swf", "application/x-shockwave-flash");
  		}
  
  		return null;
  	}
code: protected function leadSWF()
  	{
  		$exif  = exif_imagetype($this->file);
  		$flash = ($exif === IMAGETYPE_SWF || $exif === IMAGETYPE_SWC);
  
  		if ($exif)
  		{
  			return $this->closeCase("swf", "application/x-shockwave-flash");
  		}
  
  		return null;
  	}
code_tokens: protected function leadSWF ( ) { $ exif = exif_imagetype ( $ this -> file ) ; $ flash = ( $ exif === IMAGETYPE_SWF || $ exif === IMAGETYPE_SWC ) ; if ( $ exif ) { return $ this -> closeCase ( "swf" , "application/x-shockwave-flash" ) ; } return null ; }
docstring: Checks if the file is a SWF.
  
  @return boolean|null
docstring_tokens: Checks if the file is a SWF .