source: my-tickets/trunk/mt-payment-settings.php

                                                                        ?>
                                                                        <p>
                                                                                <input type="search" aria-describedby="mt_purchase_page_new" size='9' class='suggest' id="mt_purchase_page" name="mt_purchase_page" value="<?php echo stripslashes( esc_attr( $options['mt_purchase_page'] ) ); ?>" required aria-required="true" />
                                                                                <label for="mt_purchase_page">
                                                                                        <?php _e( 'Shopping cart', 'my-tickets' ); ?><br />
                                                                                        <em class='current'><?php echo wp_kses_post( $current_purchase_page ); ?></em>
                                                                                </label>
                                                                                <span class='new' aria-live="assertive" id="mt_purchase_page_new"></span>
                                                                        </p>
                                                                        <p>
                                                                                <input type="search" aria-describedby="mt_receipt_page_new"  size='9' class='suggest' id="mt_receipt_page" name="mt_receipt_page" value="<?php echo stripslashes( esc_attr( $options['mt_receipt_page'] ) ); ?>" required aria-required="true"/>
                                                                                <label for="mt_receipt_page">
                                                                                        <?php _e( 'Receipt page', 'my-tickets' ); ?><br />
                                                                                        <em class='current'><?php echo wp_kses_post( $current_receipt_page ); ?></em>
                                                                                </label>
                                                                                <span class='new' aria-live="assertive" id="mt_receipt_page"></span>
                                                                        </p>
                                                                        <p>
                                                                                <input type="search" aria-describedby="mt_tickets_page_new" size='9' class='suggest' id="mt_tickets_page" name="mt_tickets_page" value="<?php echo stripslashes( esc_attr( $options['mt_tickets_page'] ) ); ?>" required aria-required="true"/>
                                                                                <label for="mt_tickets_page">
                                                                                        <?php _e( 'Tickets page', 'my-tickets' ); ?><br />
                                                                                        <em class='current'><?php echo wp_kses_post( $current_tickets_page ); ?></em>
                                                                                </label>
                                                                                <span class='new' aria-live="assertive" id="mt_tickets_page_new"></span>
                                                                        </p>
                                                                </fieldset>
                                                        </div>
                                                </div>
                                        </div>
                                        <p class="mt-save-settings"><input type="submit" name="mt-payment-settings" class="button-primary" value="<?php _e( 'Save Payment Settings', 'my-tickets' ); ?>"/></p>
                                </form>
                        </div>
                </div>
                <?php mt_show_support_box(); ?>
        </div>
        <?php
        // creates settings page for My tickets.
}

/**
 * Return current currency symbol.
 *
 * @param array $currency Currencies.
 *
 * @return string
 */
function mt_symbols( $currency ) {
        $currencies = mt_currency();
        $symbol     = $currencies[ $currency ]['symbol'];
        $symbol     = ( ! $symbol ) ? $currency : $symbol;

        return $symbol;
}

/**
 * All currencies.
 *
 * @return array
 */
function mt_currency() {
        /**
         * Filter array of available currencies. Currencies available vary depending on payment gateway used.
         *
         * @hook mt_currencies
         *
         * @param {array} $currencies Array of currencies available.
         *
         * @return {array}
         */
        $currencies = apply_filters(
                'mt_currencies',
                array(
                        'USD' => array(
                                'symbol'      => '$',
                                'description' => __( 'U.S. Dollars ($)', 'my-tickets' ),
                        ),
                        'EUR' => array(
                                'symbol'      => '€',
                                'description' => __( 'Euros (€)', 'my-tickets' ),
                        ),
                        'AUD' => array(
                                'symbol'      => 'A $',
                                'description' => __( 'Australian Dollars (A $)', 'my-tickets' ),
                        ),
                        'CAD' => array(
                                'symbol'      => 'C $',
                                'description' => __( 'Canadian Dollars (C $)', 'my-tickets' ),
                        ),
                        'CZK' => array(
                                'symbol'      => 'Kč',
                                'description' => __( 'Czech Koruna (Kč)', 'my-tickets' ),
                        ),
                        'GBP' => array(
                                'symbol'      => '£',
                                'description' => __( 'Pounds Sterling (£)', 'my-tickets' ),
                        ),
                        'INR' => array(
                                'symbol'      => '₹',
                                'description' => __( 'Indian Rupees (₹)', 'my-tickets' ),
                        ),
                        'JPY' => array(
                                'symbol'      => '¥',
                                'description' => __( 'Yen (¥)', 'my-tickets' ),
                                'zerodecimal' => true,
                        ),
                        'NZD' => array(
                                'symbol'      => '$',
                                'description' => __( 'New Zealand Dollar ($)', 'my-tickets' ),
                        ),
                        'CHF' => array(
                                'symbol'      => 'CHF ',
                                'description' => __( 'Swiss Franc', 'my-tickets' ),
                        ),
                        'HKD' => array(
                                'symbol'      => '$',
                                'description' => __( 'Hong Kong Dollar ($)', 'my-tickets' ),
                        ),
                        'SGD' => array(
                                'symbol'      => '$',
                                'description' => __( 'Singapore Dollar ($)', 'my-tickets' ),
                        ),
                        'SEK' => array(
                                'symbol'      => 'kr ',
                                'description' => __( 'Swedish Krona', 'my-tickets' ),
                        ),
                        'DKK' => array(
                                'symbol'      => 'kr ',
                                'description' => __( 'Danish Krone', 'my-tickets' ),
                        ),
                        'PLN' => array(
                                'symbol'      => 'zł',
                                'description' => __( 'Polish Zloty', 'my-tickets' ),
                        ), // this is triggedec9decring an error. Why.
                        'NOK' => array(
                                'symbol'      => 'kr ',
                                'description' => __( 'Norwegian Krone', 'my-tickets' ),
                        ),
                        'HUF' => array(
                                'symbol'      => 'Ft ',
                                'description' => __( 'Hungarian Forint', 'my-tickets' ),
                                'zerodecimal' => true,
                        ),
                        'ILS' => array(
                                'symbol'      => '₪',
                                'description' => __( 'Israeli Shekel', 'my-tickets' ),
                        ),
                        'MXN' => array(
                                'symbol'      => '$',
                                'description' => __( 'Mexican Peso', 'my-tickets' ),
                        ),
                        'BRL' => array(
                                'symbol'      => 'R$',
                                'description' => __( 'Brazilian Real', 'my-tickets' ),
                        ),
                        'MYR' => array(
                                'symbol'      => 'RM',
                                'description' => __( 'Malaysian Ringgits', 'my-tickets' ),
                        ),
                        'PHP' => array(
                                'symbol'      => '₱',
                                'description' => __( 'Philippine Pesos', 'my-tickets' ),
                        ),
                        'TWD' => array(
                                'symbol'      => 'NT$',
                                'description' => __( 'Taiwan New Dollars', 'my-tickets' ),
                                'zerodecimal' => true,
                        ),
                        'THB' => array(
                                'symbol'      => '฿',
                                'description' => __( 'Thai Baht', 'my-tickets' ),
                        ),
                        'TRY' => array(
                                'symbol'      => 'TRY ',
                                'description' => __( 'Turkish Lira', 'my-tickets' ),
                        ),
                        'ZAR' => array(
                                'symbol'      => 'R',
                                'description' => __( 'South African Rand', 'my-tickets' ),
                        ),
                )
        );

        ksort( $currencies );

        return $currencies;
}

/**
 * Is the current currency a zerodecimal type.
 *
 * @return bool
 */
function mt_zerodecimal_currency() {
        $options    = mt_get_settings();
        $currency   = $options['mt_currency'];
        $currencies = mt_currency();
        $data       = $currencies[ $currency ];

        if ( isset( $data['zerodecimal'] ) && true === $data['zerodecimal'] ) {
                return true;
        }

        return false;
}