I've written an extension to do some additional processing on submitted form content within the ExpressionEngine publish page, however there is a scenario where I want to return an error to the user if a value they have specified is invalid.

Is there a way to do this with an extension, some function I can call to return a validation error but retain the form input so the user isn't forced to start again?

Obviously I could just use 'show_error' but this seems a little brutal and not what would be expected. :)

1 Answer 1


Check out this array:


You can check its contents and add to it. I forget the best hook to use this in, but it might be entry_submission_start?


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