How do you access Gravity Form fields pre-submission? - forms

Question

I'm trying to access the Gravity Forms fields pre-submission to check for gibberish entries. I've tried pretty much everything on StackOverflow and no luck.
The form is id #1. Some of the 1000 things I've tried include:
GFFormsModel::get_form_meta(1);
GFFormsModel::get_leads(1);
$_POST['input_1']
and reading this:
https://docs.gravityforms.com/gform_pre_submission/
How do I do this?

Answer 1

If you want to fail silently for spam entries, I would recommend using the gform_validation filter and, if you determine that the submission is spam, dynamically enable the honey pot. Gravity Forms will then fail the submission silently. The confirmation will be displayed but the entry will not be created.
Here's how my GP Blacklist plugin handles this:
$honeypot_field_id = GFFormDisplay::get_max_field_id( $form ) + 1;
$_POST[ "input_{$honeypot_field_id}" ] = true;
$form['enableHoneypot'] = true;
$result['is_valid'] = true;
EDIT
To actually retrieve the value, the simplest way is to just fetch it from the $_POST (FYI, there are more thorough techniques). Here's a more robust example.
add_filter( 'gform_validation', function( $result ) {
// Get the value of field ID 1
$value = rgpost( 'input_1' );
if( $value == 'gibberish' ) {
// activate honeypot
}
return $result;
} );