php解析json数组

    function urltest(){
        $url='http://121.43.153.80:8983/solr/collection1/select?q=+searchkey%3a%E4%BC%9A%E8%AE%A1&fq=cityid:73&start=0&rows=3&wt=json&indent=true&group=true&group.field=courseid';
        // 1. 初始化
        $ch = curl_init();
        // 2. 设置选项，包括URL
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        // 3. 执行并获取HTML文档内容
        $output = curl_exec($ch);
        // 4. 释放curl句柄
        curl_close($ch);

        $result= json_decode($output);
        $jarray=$result->grouped->courseid->groups;
        dump($jarray[0]);
    }