php引用discuz地址获取关键词（www.rijigu.com）

为了获取文章内容的关键词，找了很多方法，感觉这个还不错，拿出来分享给大家。如果大家想要看实际效果的话，去www.rijigu.com文章的发布页，那里能看到效果的。希望大家多多支持

function sw_discuz($contents){
        $str = strip_tags($contents);
        $arr = array(' ',' ',"\s", "\r\n", "\n", "\r", "\t", ">", "“", "”","<br />");
        $str = str_replace($arr, '', $str);
        if(strlen($str)>2400){
            $str = substr($str, '0', '2400');
        }
        $str = rawurlencode($str); // 初始化一个 cURL 对象
        $url = "http://keyword.discuz.com/related_kw.html?title=$str&ics=utf-8&ocs=utf-8";
        $curl = curl_init(); // 将urlencode后的字符串提交到discuz的分词URL
        curl_setopt($curl, CURLOPT_URL,$url);
        curl_setopt($curl, CURLOPT_HEADER, 0);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($curl);
        $xml = simplexml_load_string($data, 'SimpleXMLElement', LIBXML_NOCDATA);
        $words_tmp = $xml -> keyword ->result;
        $wordsArray = array();
        foreach($words_tmp -> item as $val){
            $kw = (array)$val -> kw;
            $wordsArray[] = $kw[0];
        }
        return $wordsArray;
    }