php curl post请求

/**
     * CreateBy Song
     * @param String $url url地址
     * @param Array $post url参数
     * @return Array
     */
    function PostCUrl($url, $post) {
        header("content-type:text/html;charset=utf-8");
        $data = json_encode($post);
        $ch = curl_init ();
        curl_setopt ( $ch, CURLOPT_URL, $url );
        curl_setopt ( $ch, CURLOPT_POST, true );
        curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );
        curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt ( $ch, CURLOPT_HEADER, false );
        curl_setopt ( $ch, CURLOPT_TIMEOUT, 30 );
        $result = curl_exec ( $ch ); //这个是读到的值
        if(curl_errno($ch)){
            print_r(curl_error($ch));
        }
        curl_close ( $ch );
        unset ( $ch );
        return json_decode($result,true);
    }