Smart shortcode to generate unique 5 digit number

ff_Unique_5_digit_ID.php

/*
 * Add the smartcode to the list
 */
add_filter('fluentform_editor_shortcodes', function ($smartCodes) {
    $smartCodes[0]['shortcodes']['{5_digit_unique_id}'] = 'Unique ID (5 digit)';
    return $smartCodes;
});

/*
 * Transform the smartcode
 */
add_filter('fluentform_editor_shortcode_callback_5_digit_unique_id', function ($value, $form) {
	$digits = 5;
    return rand(pow(10, $digits-1), pow(10, $digits)-1);;
}, 10, 2);