Source code for https://formidable-masterminds.com/easily-create-php-variables-for-every-form-field/

create_php_variables.php

<?php

function create_init_field_vars_array( $form_key ) {
    global $wpdb;
    /* initialize the variables for the formidable tables */
    $wpdb_prefix = $wpdb->prefix;
    $frm_fields = $wpdb_prefix . 'frm_fields';

    $form_id = FrmForm::get_id_by_key( $form_key );
    $new_key = str_replace('-', '_', $form_key);
    $init_form_vars_array[$new_key] = $form_id;
    
    $sql = "SELECT field_key, id FROM `{$frm_fields}` where form_id='{$form_id}' order by field_order;";
    
    $results = $wpdb->get_results( $sql );
    
    if( $results ) {
        foreach( $results AS $field_entry ) {
            $init_form_vars_array[$field_entry->field_key] = $field_entry->id;
        }
    } 
    return $init_form_vars_array;
}