wordpress使用ping百度无效解决方法

function bdping($post_id) {
    $baiduXML = 'weblogUpdates.extendedPing' . get_option('blogname') . ' ' . home_url() . ' ' . get_permalink($post_id) . ' ' . get_feed_link() . ' ';
    $wp_http_obj = new WP_Http();
    $return = $wp_http_obj->post('http://ping.baidu.com/ping/RPC2', array('body' => $baiduXML, 'headers' => array('Content-Type' => 'text/xml')));
    if(isset($return['body'])){
        if(strstr($return['body'], '0')){
            $noff_log='succeeded!';
        }
        else{
            $noff_log='failed!';
        }
    }else{
        $noff_log='failed!';
    }
}
add_action('publish_post', 'bdping');