custom code not working in function.php

Please I want to assign a predefined random values to hidden field automaticaly in gravity form and I added this code to my function.php but still not working could you please help fix this

// Add this code to your theme's functions.php file or custom plugin

// Define an array of predefined values for the field
function get_predefined_values() {
    $values = array(
        'Value 1',
        'Value 2',
        'Value 3',
        // Add more values as needed
    );

    return $values;
}

// Assign a random value to the field on entry save
function assign_random_value($entry, $form) {
    $predefined_values = get_predefined_values();
    $random_value = $predefined_values[array_rand($predefined_values)];

    // Replace '2' with the actual field ID of the field you want to assign values to
    $entry['9'] = $random_value;

    return $entry;
}
add_filter('gform_entry_post_save', 'assign_random_value', 10, 2);

// Populate the field value with the assigned random value
function populate_random_value($value, $field, $name) {
    // Replace '2' with the actual field ID of the field you want to assign values to
    if ($field->id == 9) {
        $predefined_values = get_predefined_values();
        $random_value = $predefined_values[array_rand($predefined_values)];

        return $random_value;
    }

    return $value;
}
add_filter('gform_field_value', 'populate_random_value', 10, 3);

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