WordPress 新文章实现同步图文新浪微博

多说中有个较为实用的功能——“同时发布到”，只需要绑定新浪微博、腾讯微博、百度……只需勾选编辑文章页上的选项，一键搞定。如果我们需要在主题中集成此功能呢？方法来自发哥，感谢分享。

实现方法：

把下面的代码加到 functions.php 中，注意添加access_token 和默认图片地址两个参数，access_token 的获得方法参考相关文章（比如说 CNBlogs）。

class sync_sina {

    public $access_token = "";//access_token
    
    public $default_image = "";//默认图片地址

    public $host = "https://api.weibo.com/2/";
       
    public static $boundary = '';
       
    function __construct(){
        /**
         ** 事件绑定
         **/
        add_action('publish_post', array($this, 'new_post_photo'));
    }

    function do_mu_post($url, $data) {
        $ch = curl_init ();
        $headers = array("Content-Type:multipart/form-data;boundary=". self::$boundary);
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, TRUE );
        curl_setopt ( $ch, CURLOPT_POST, TRUE );
        curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );
        curl_setopt ( $ch, CURLOPT_URL, $url );
        curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        $ret = curl_exec ( $ch );
        curl_close ( $ch );
        return $ret;
    }

    function build_http_query_multi($params) {
        if (!$params) return '';
        uksort($params, 'strcmp');
        $pairs = array();
        self::$boundary = $boundary = uniqid('------------------');
        $MPboundary = '--'.$boundary;
        $endMPboundary = $MPboundary. '--';
        $multipartbody = '';
        foreach ($params as $parameter => $value) {
            if( in_array($parameter, array('pic', 'image')) && $value{0} == '@' ) {
                $url = ltrim( $value, '@' );
                $content = file_get_contents( $url );
                $array = explode( '?', basename( $url ) );
                $filename = $array[0];
                $multipartbody .= $MPboundary . "\r\n";
                $multipartbody .= 'Content-Disposition: form-data; name="' . $parameter . '"; filename="' . $filename . '"'. "\r\n";
                $multipartbody .= "Content-Type: image/unknown\r\n\r\n";
                $multipartbody .= $content. "\r\n";
            } else {
                $multipartbody .= $MPboundary . "\r\n";
                $multipartbody .= 'content-disposition: form-data; name="' . $parameter . "\"\r\n\r\n";
                $multipartbody .= $value."\r\n";
            }
        }
        $multipartbody .= $endMPboundary;
        return $multipartbody;
    }

    function get_image($post_id){
        if( has_post_thumbnail($post_id) ){
            $timthumb_src = wp_get_attachment_image_src(get_post_thumbnail_id($post_id),'full');
            $output = $timthumb_src[0];
        } else {
            $content = get_post_field('post_content', $post_id);
            $defaltthubmnail = $this->default_image;
            preg_match_all('/<img.*?(?: |\\t|\\r|\\n)?src=[\'"]?(.+?)[\'"]?(?:(?: |\\t|\\r|\\n)+.*?)?>/sim', $content, $strResult, PREG_PATTERN_ORDER);
            $n = count($strResult[1]);
            if($n > 0){
                $output = $strResult[1][0];
            } else {
                $output = $defaltthubmnail;
            }
        }
        return $output;
    }

    function new_post_photo($post) {
        global $post;
        if( $post->post_status != "publish" ){
            $token = $this->access_token;
            $url = $this->host ."statuses/upload.json";
            $status = "我刚刚发布了新文章《".get_the_title()."》。".get_permalink();
            $status .= mb_strimwidth(strip_tags(apply_filters('the_content', $post->post_content)), 0,180,"..."); //顺手加了个文章摘要，不喜欢就去掉啦
            $pic_path = self::get_image($post->ID);
            $params = array();
            $params['access_token'] = $token;
            $params['status'] = $status;
            $params['pic'] = '@'.$pic_path;
            $body = self::build_http_query_multi($params);
            $result = self::do_mu_post($url,$body);

        }
    }
}
$HMT = new sync_sina();

注意

• 需要服务器支持file_get_contents；
• 可能因为服务器等不可抗力原因造成发送失败或者发布文章时间变长；
• 如果应用未通过审核小尾巴会为未审核应用。