public function getNewFileNameIfFileNameExistsIn($fileName='',$directory='')
	{
		$extension = $this->getExtensionFromFile($fileName);
		$partieGauche = $this->getFileNameWithoutExtension($fileName);
		
		$i=0;
		while(file_exists($directory.$partieGauche.".".$extension))
		{
			$partieGauche.=$i;
			$i++;
		}
		
		return $partieGauche.".".$extension;
	}