Displaying error messages on a custom error page
On the error page of a form the field is used as a placeholder for the error message. This allows you to choose where the error message will be displayed. When you use a custom error page you cannot use the placeholder and instead the error message is passed to the error page in the Errors parameter. For example the URL for your error page might look something like this:
http://www.domain.com/error.html?Error=error+string+here
In order to print the error message on your custom error page you will need to get the Error parameter from the URL. If you're using a server-side scripting language for your custom error page printing the error message is as simple as printing the value of the Errors parameter. For example if you're using PHP:
An error occurred and your subscription was not completed:
If a server-side language is not available you can still print the error message using JavaScript. This is a bit more complicated since you will need to parse the URL in the JavaScript. A regular expression is ideal for this:
An error occurred and your subscription was not completed:
