AyeCode / invoicing

    $start_date         = wpinv_get_discount_start_date( $discount_id );

    $expiration_date    = wpinv_get_discount_expiration( $discount_id );

    if ( ! empty( $start_date ) && strpos( $start_date, '0000' ) === false ) {

        $start_time         = strtotime( $start_date );

        $start_h            = date_i18n( 'H', $start_time );

        $start_m            = date_i18n( 'i', $start_time );

        $start_date         = date_i18n( 'Y-m-d', $start_time );

    } else {

        $start_h            = '00';

        $start_m            = '00';

    }

    if ( ! empty( $expiration_date ) && strpos( $expiration_date, '0000' ) === false ) {

        $expiration_time    = strtotime( $expiration_date );

        $start_m            = '00';

    }

    if ( ! empty( $expiration_date ) && strpos( $expiration_date, '0000' ) === false ) {

        $expiration_time    = strtotime( $expiration_date );

        $expiration_h       = date_i18n( 'H', $expiration_time );

        $expiration_m       = date_i18n( 'i', $expiration_time );

        $expiration_date    = date_i18n( 'Y-m-d', $expiration_time );

    } else {

        $expiration_h       = '23';

        $expiration_m       = '59';

    }

    $min_total          = $min_total > 0 ? $min_total : '';

    $max_total          = $max_total > 0 ? $max_total : '';