public function getExpression()
    {
        $expression = array(
            $this->minute,
            $this->hour,
            $this->dayOfMonth,
            $this->month,
            $this->dayOfWeek
        );

        return implode(' ', $expression);
    }
public function getExpression()
    {
        $expression = array(
            $this->minute,
            $this->hour,
            $this->dayOfMonth,
            $this->month,
            $this->dayOfWeek
        );

        return implode(' ', $expression);
    }
public function getExpression ( ) { $ expression = array ( $ this -> minute , $ this -> hour , $ this -> dayOfMonth , $ this -> month , $ this -> dayOfWeek ) ; return implode ( ' ' , $ expression ) ; }
Return the cron expression

@return string cron expression
Return the cron expression