opencafe / datium

   * @since Oct, 17 2015

   * @return object

   */

public function hijriToJalali( $date_time ) {

  $this->date_time = $date_time;

  $this->year = $this->date_time->format( 'Y' );

  $this->month = $this->date_time->format( 'm' );

  $this->day = $this->date_time->format( 'd' );

  $days_of_year = 0;

  $this->config = include( 'Hijri.php' );

  foreach ( $this->config[ 'month_days_number' ] as $month => $value ) {

    if ( $this->month > $month ) $days_of_year += $value;

  }

  $days_of_year += $this->day;

  $days_of_leap_years =  intval( ( ( $this->year - 1 ) / 3 )  );

  $days_of_hijri_years = ( ( ( $this->year - 1 ) * 354 ) + $days_of_year + $days_of_leap_years );

  $days_of_jalali_years = $days_of_hijri_years + 179;

  $days_of_jalali_years = $days_of_jalali_years - intval( ( ( $this->year - 43 ) / 4 ) );

  $jalali_month = ( $days_of_jalali_years % 365 );

  $jalali_year = intval( $days_of_jalali_years / 365 ) + 1;

  $this->config = include( 'Jalali.php' );

  foreach ($this->config[ 'month_days_number' ] as $month => $value) {

    if ( $jalali_month < $value ) break;

      $jalali_month -= $value;

  }

  $jalali_day = $jalali_month;

  $jalali_month = $month;

  $this->date_time->setDate( $jalali_year, $jalali_month, $jalali_day );

 return $this->date_time;

}

  /**

    * convert hijri year to gregorian year

    * @since Oct, 17 2015

    * @return object

    */

  public function hijriToGregorian( $date_time ) {

    $this->date_time = $date_time;

    $this->year = $this->date_time->format( 'Y' );

    $this->month = $this->date_time->format( 'm' );

    $this->day = $this->date_time->format( 'd' );

    $days_of_year = 0;

    $this->config = include( 'Hijri.php' );

    foreach ( $this->config[ 'month_days_number' ] as $month => $value ) {

      if ( $this->month > $month ) $days_of_year += $value;

    }

    $days_of_year += $this->day;

    $days_of_leap_years =  intval( ( ( $this->year - 1 ) / 3 )  );

    $days_of_hijri_years = ( ( ( $this->year - 1 ) * 354 ) + $days_of_year + $days_of_leap_years );

    $days_of_gregorain_years = $days_of_hijri_years + 227078;

    $days_of_gregorain_years = $days_of_gregorain_years - intval( ( ( $this->year + 578 ) / 4 ) );

    $gregorian_month = ( $days_of_gregorain_years % 365 );

    $gregorian_year = intval( $days_of_gregorain_years / 365 ) + 1;

    $this->config = include( 'Gregorian.php' );

    foreach ($this->config[ 'month_days_number' ] as $month => $value) {

      if ( $gregorian_month < $value ) break;

        $gregorian_month -= $value;

    }

      $gregorian_day = $gregorian_month;

      $gregorian_month = $month;

      $this->date_time->setDate( $gregorian_year, $gregorian_month, $gregorian_day );

     return $this->date_time;

  }

}