Lock form fields during post edit

I’m thinking I can edit the appropriate plugin file (whichever one is building the form to be edited). I can use an if statement to determine if the logged in user is the post author and, if not, make certain fields readonly.

But which file and where in that file should I place the code?

Great! I think this may help me with a hack I’m needing. But where does the code posted by Tareq go, exactly…. from http://wedevs.com/support/topic/hide-fields-in-edit-form/#post-6918

function wpufe_assign_new_form( $post_id, $form_id ) {
if ( $form_id == ‘5’ ) {
update_post_meta( $post_id, ‘_wpuf_form_id’, 6 );
}
}
add_action( ‘wpuf_add_post_after_insert’, ‘wpufe_assign_new_form’, 10, 2 );

This solution will allow me to create a second form with all the fields hidden as needed, leaving only the editable field displayed. But where do I put it?

Thanks!

it goes to your theme’s function.php file