Use this code to filter the options in a Dynamic field. This example will make it so the option will only appear if there is a field that equals "Yes" in the linked form.

When the box to include uploaded files in the email is checked in an upload field, you can remove them from some notifications.

It checks to ensure that no special characters are in the values inputted by the form user.

It was developed to detect and prevent special characters being added to the database.

It was needed to support the Comprehensive Google Map plugin, as that plugin does not like having non-alpha-numeric characters in any field it is displaying. The plugin is here: http://wordpress.org/plugins/comprehensive-google-map-plugin/

If you have dev / test / staging / production instances of WP, be sure to use the production form IDs in your production functions.php.