因此，我想到了以下似乎有效的方法：

此函数将按用户id搜索并找到相应的cron作业

function search_user_cron( $hook, $user_id ) {

    $crons = _get_cron_array();

    foreach( $crons as $timestamp => $cron ) 

        if( isset( $cron[$hook] ) ) 

            foreach( $cron as $jobs ) 

                foreach( $jobs as $key => $job ) 

                    if( $job[\'args\'][0][\'customer\'][\'user_id\'] == $user_id )

                        return array( \'id\' => $user_id, \'timestamp\' => $timestamp, \'key\' => $key );

}

function replace_cron_args( $hook, $user_id ) {

    // lets find the cron job corresponding to the user id
    $user = search_user_cron( $hook, $user_id );

    // get all the current cron jobs
    $crons = _get_cron_array();

    // get the most recent updated arguments
    $stored_args = get_user_meta( $user[\'id\'], \'oe_customer_details\', true );

    // get the current user key
    $key = $user[\'key\'];

    // get the current user timestamp
    $timestamp = $user[\'timestamp\'];

    // serialize the new arguments
    $newkey = md5( serialize( $stored_args ) );

    // update the stored arguments
    $crons[$timestamp][$hook][$key][\'args\'][0] = $stored_args;

    // replace the key with the new serialized key
    $crons[$timestamp][$hook][$newkey] = $crons[$timestamp][$hook][$key];

    // unset the old array
    unset( $crons[$timestamp][$hook][$key] );

    // set the new cron jobs
    _set_cron_array( $crons );

}