有人能给我指出正确的方向吗？

我正在尝试设置一个插件，该插件在激活时设置cron作业，以在用户的user\\u注册日期3个月后更改用户的user\\u角色。当插件被停用时，cron作业也应该被删除。

目前，以下代码不起作用。cron作业将运行，但用户角色不会更新。

The plugin code so far is:

<?php
/*
Plugin Name: Cron Job
*/

add_filter( \'cron_schedules\', \'example_add_cron_interval\' );

function example_add_cron_interval( $schedules ) {
    $schedules[\'five_seconds\'] = array(
        \'interval\' => 5,
        \'display\'  => esc_html__( \'Every Five Seconds\' ),
    );

    return $schedules;
}

function cron_hook(){
    $users = get_users(
        array(
            \'fields\' => array( \'ID\', \'user_registered\' ),
            \'role\'   => \'coaching\',
        )
    );

    foreach ( $users as $user ) {

        $time = $user->user_registered;

        if(strtotime($time) < strtotime(\'-3 months\')) {
            $u = new WP_User( $user->ID );
            // Remove role
            print_r($u);

            $u->remove_role( \'coaching\' );

            // Add role
            $u->add_role( \'platinum\' );
        }
    }
}

//echo \'<pre>\'; print_r( _get_cron_array() ); echo \'</pre>\';

public static function activate() {
    wp_schedule_event( time(), \'five_seconds\', \'cron_job\' );
}

public static function deactivate() {
    wp_clear_scheduled_hook(\'cron_job\');
}

我正在运行wp cron。php到cPanel（当前测试设置为5\\u秒）。

register_activation_hook ( __FILE__, \'cron_job\' );

function cron_job() 
{
wp_schedule_event( time(), \'hourly\', \'hourly_job\' );
}

add_action( \'hourly_job\', \'cron_job_task\' );

function cron_job_task () 
{
    $users = get_users(
        array(
            \'fields\' => array( \'ID\', \'user_registered\' ),
            \'role\'   => \'coaching\',
        )
    );

    foreach ( $users as $user ) {
        $time = $user->user_registered;
        if(strtotime($time) < strtotime(\'-3 months\')) {
            $u = new WP_User( $user->ID );
            $u->remove_role( \'coaching\' );
            $u->add_role( \'platinum\' );
        }
    }
}
?>