Using a custom query parameter to dynamically specify a user ID for editing with Advanced Forms Pro.

advanced-forms-pro-dynamic-user-editing.php

<?php

add_filter( 'af/form/args', 'afp_demo_support_dynamic_user_editing', 10, 2 );

/**
 * @param array $args
 * @param array $form
 *
 * @return array
 */
function afp_demo_support_dynamic_user_editing( $args, $form ) {

	// If there is no query arg, return early.
	if ( ! isset( $_GET['afp_edit_user'] ) ) {
		return $args;
	}
	
	// You should consider adding capability checks here to ensure the 
	// current logged in user is allowed to edit the requested user.

	// Extract the user ID from the custom query arg and add it to the 
	// form args.
	$args['user'] = intval( $_GET['afp_edit_user'] );

	return $args;
}