_convert_date_to_sql_date

	protected function _convert_date_to_sql_date($date)
	{
		$date = substr($date,0,10);
		if(preg_match('/\d{4}-\d{2}-\d{2}/',$date))
		{
			//If it's already a sql-date don't convert it!
			return $date;
		}elseif(empty($date))
		{
			return '';
		}
		
		$date_array = preg_split( '/[-\.\/ ]/', $date);
		if($this->php_date_format == 'd/m/Y')
		{
			$sql_date = date('Y-m-d',mktime(0,0,0,$date_array[1],$date_array[0],$date_array[2]));
		}
		elseif($this->php_date_format == 'm/d/Y')
		{
			$sql_date = date('Y-m-d',mktime(0,0,0,$date_array[0],$date_array[1],$date_array[2]));
		}
		else
		{
			$sql_date = $date;
		}
		
		return $sql_date;
	}