wordpress实现发布文章自动ping 百度

//文章发布主动ping baidu 
function pingbaidu($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', 'pingbaidu');