我在下面的代码中也指出了一些事情：

您正在覆盖从中读取的选项get_option 使用array_merge__destruct 只是不起作用。（我还没有任何线索，可能专家们会对此有所了解。我已经用HKFIX, 有一点描述：

/**
 * Constructor
 * @author Ian Dunn <[email protected]>
 */
public function __construct()
{

    // Initialize variables
    $defaultOptions         = array( \'updates\' => array(), \'errors\' => array() );

    /* HKFIX: array_merge was overwriting the values read from get_option, 
     * moved $defaultOptions as first argument to array_merge */
    $this->options          = array_merge( $defaultOptions, get_option( self::PREFIX . \'options\', array() ) );
    $this->updatedOptions   = false;

    /* HKFIX: the count for update and error messages was hardcoded,
     * which was ignoring the messages already in the options table read above
     * later in print the MessageCounts is used in loop
     * So I updated to set the count based on the options read from get_option */
    $this->userMessageCount = array();
    foreach ( $this->options as $msg_type => $msgs ) {
        $this->userMessageCount[$msg_type] = count( $msgs );
    }
    // more

    add_action( \'admin_notices\',    array($this, \'printMessages\') );
    add_action( \'post_updated\',     array($this, \'saveCustomFields\') );

    // does other stuff
}

/**
 * Saves values of the the custom post type\'s extra fields
 * @author Ian Dunn <[email protected]>
 */
public function saveCustomFields()
{
    // does stuff

    /* HKFIX: this was false, so changed it to true, may be not a fix but thought I should mention ;) */
    if( true )
        $this->enqueueMessage( \'foo\', \'error\' );

}

/**
 * Displays updates and errors
 * @author Ian Dunn <[email protected]>
 */
public function printMessages()
{

    foreach( array(\'updates\', \'errors\') as $type )
    {
        if( $this->options[$type] && ( self::DEBUG_MODE || $this->userMessageCount[$type] ) )
        {
            echo \'<div id="message" class="\'. ( $type == \'updates\' ? \'updated\' : \'error\' ) .\'">\';
            foreach($this->options[$type] as $message)
                if( $message[\'mode\'] == \'user\' || self::DEBUG_MODE )
                    echo \'<p>\'. $message[\'message\'] .\'</p>\';
            echo \'</div>\';

            $this->options[$type] = array();
            $this->updatedOptions = true;
            $this->userMessageCount[$type] = 0;

        }
    }

    /* HKFIX: Save the messages, can\'t wait for destruct */
    if ( $this->updatedOptions ) {
        $this->saveMessages();
    }

}

/**
 * Queues up a message to be displayed to the user
 * @author Ian Dunn <[email protected]>
 * @param string $message The text to show the user
 * @param string $type \'update\' for a success or notification message, or \'error\' for an error message
 * @param string $mode \'user\' if it\'s intended for the user, or \'debug\' if it\'s intended for the developer
 */
protected function enqueueMessage($message, $type = \'update\', $mode = \'user\')
{

    array_push($this->options[$type .\'s\'], array(
        \'message\' => $message,
        \'type\' => $type,
        \'mode\' => $mode
    ) );


    if($mode == \'user\')
        $this->userMessageCount[$type . \'s\']++;

    /* HKFIX: save the messages, can\'t wait for destruct */
    $this->saveMessages();
}

/* HKFIX: Dedicated funciton to save messages 
 * Can also be called from destruct if that is really required */
public function saveMessages() 
{
        update_option(self::PREFIX . \'options\', $this->options);
}

/**
 * Destructor
 * Writes options to the database
 * @author Ian Dunn <[email protected]>
 */
public function __destruct()
{
    /* HKFIX: Can\'t rely on saving options in destruct, this just does not work */
        // its very late to call update_options in destruct
        //update_option(self::PREFIX . \'options\', $this->options);

}