Gravity Forms: Example of conditionally requiring a field based on the value of another field.

gravity-forms-conditionally-require-fields.php

<?php
/**
 * Gravity Forms: Example of conditionally requiring a field based on the value of another field.
 */
add_filter( 'gform_pre_render', 'gw_conditional_requirement' );
add_filter( 'gform_pre_validation', 'gw_conditional_requirement' );
function gw_conditional_requirement( $form ) {

    $value = rgpost( 'input_2' );
    if( $value == 'no' )
        return $form;

    foreach( $form['fields'] as &$field ) {

        if( $field['id'] == 1 ) {
            $field['isRequired'] = true;
        }

    }

    return $form;
}

Thanks - am I correct in thinking this will kick in on the form regular and Ajax POST action and then trigger the form to fail validation, but it won't create the javascript conditional logic?

Can anyone comment on the above point? Need to know the JS solutions as well.

Awesome. Thanks!

Hi, thanks for the advice, but I have one question, is that possible to get checkbox status, if is checked or not ? I have a big problem with that

In case anyone's wondering about this, this snippet is at https://docs.gravityforms.com/gform_pre_validation/ so you could ask Gravity Forms' support about "their own" snippet if you have follow-up questions.