将WordPress小部件升级到API而不会破坏旧的

时间:2011-02-21 17:30:41

标签: wordpress

当天我建立了一个使用现已弃用的推特小部件插件:

register_sidebar_widget()

我想从WordPress 2.8升级到widget API,但我也不想破坏所有现有的安装。有没有办法告诉我的新小部件从旧小部件中提取设置(如果存在?)

我一直在进行一些测试,看起来我可以临时取出旧设置,但是我在边栏中复制旧的widget实例时遇到了麻烦。当我上传新代码时(即使我的对象命名相同),它会从侧边栏中抽出旧的小部件,我必须再次添加它。

旧代码:

// Run code and init
add_action('widgets_init', 'widget_reliabletwitter_init');

function widget_reliabletwitter_init() {
    // Register widget for use
    register_sidebar_widget(array('Reliable Twitter', 'widgets'), 'widget_reliabletwitter');

    // Register settings for use, 325x400 pixel form
    register_widget_control(array('Reliable Twitter', 'widgets'), 'widget_reliabletwitter_control', 325, 400);

新守则:

add_action('widgets_init', 'reliable_twitter_load_widgets');

function reliable_twitter_load_widgets() {
    register_widget('Reliable_Twitter');
}


class Reliable_Twitter extends WP_Widget {

    /**
     * Widget setup.
     */
    function Reliable_Twitter() {
        /* Widget settings. */
        $widget_ops = array( 'classname' => 'widget_reliabletwitter', 'description' => __('Adds a sidebar widget to display Twitter updates and uses the more-reliable Google AJAX API.', 'widget_reliabletwitter') );

        /* Widget control settings. */
        $control_ops = array( 'width' => 325, 'height' => 400, 'id_base' => 'widget_reliabletwitter' );

        /* Create the widget. */
        $this->WP_Widget( 'widget_reliabletwitter', __('Reliable Twitter', 'widget_reliabletwitter'), $widget_ops, $control_ops );
    }

1 个答案:

答案 0 :(得分:1)

按照您的示例,我发现以下代码应该有效:

class Reliable_Twitter extends WP_Widget {

/**
 * Widget setup.
 */
function Reliable_Twitter() {
    /* Widget settings. */
    $widget_ops = array( 'classname' => 'widget_reliabletwitter', 'description' => __('Adds a sidebar widget to display Twitter updates and uses the more-reliable Google AJAX API.', 'widget_reliabletwitter') );

    /* Widget control settings. */
    $control_ops = array( 'width' => 325, 'height' => 400, 'id_base' => 'widget_reliabletwitter' );

    /* Create the widget. */
    $this->WP_Widget( 'widget_reliabletwitter', __('Reliable Twitter', 'widget_reliabletwitter'), $widget_ops, $control_ops );

/* Attempt upgrade from pre 2.8.4 widgets */
if ( $old_options = get_option('widget_reliabletwitter_control') ) {
    $old_options['_multiwidget'] = 1;
    update_option('widget_widget_reliabletwitter', $old_options);
    delete_option('widget_reliabletwitter_control');
}

}

...我指的是带有get_option('widget_reliabletwitter_control')和delete_option('widget_reliabletwitter_control')的旧设置......