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Editing: payment-button.php.md
# Payment-Button.php ## Technical Description: This is an abstract class that every payment button widget will inherit from. Because every payment button is, after all, a button, this class inherits from `Widget_Button` in order to keep it as close as possible to the default button widget ( and of course to avoid unnecessary code duplications ). This class is responsible for creating the universal sections && controls of the payment buttons. In addition, it has some abstract functions to make sure that every payment button will work as it should. ## Attention Needed / Known Issues: - Use the `register_account_section()` function in order to add the API controls for your payment provider. See `widgets/paypal-button.php` for reference. - Use the `register_sandbox_controls()` function if you need more sandbox controls than the default `sandbox_mode` switch. By default, they will be registered just after the switch. - Use the `after_product_type()` function when you need to add something after the product type select-box. This is useful when you want to add a note to the user. See `widgets/paypal-button.php` for reference. - The currencies list **defaults to PayPal's supported currencies**, so when you extend it, make sure that this list is also supported in the payment method you are using, or override it with the appropriate one. - The `get_custom_message( $id )` returns a custom message that is set in the `Custom Messages` control under the `Additional Settings` section, and will default to the default errors messages that returned from `get_default_error_messages()`. You can override this function in order to extend the default custom messages. Don't forget to extend the `register_settings_section()` and `register_messages_style_section()` functions as well. - You should use `is_sandbox()` to determine if it's on sandbox mode.
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