## 获取正在直播的课程列表 ``` app('rpc.course')->call('apps.info.getLiveByCourseIdList',[$courseIdList = [1,2,3,4], $cid = 2]); ``` ~~~[api] apps.info.getLiveByCourseIdList id=1 <<< Array { "jsonrpc":"2.0", "result":[         {             "id":1,             "grade":1,             "cid":2,             "gid":1,             "liveid":1,             "unitid":0,             "sort":1,             "name":"认识图形（2）"         }     ], "id":"2bbf940d1d4da4196c3da1f128d3375c" } <<< error Array ( [error] => Array ( [code] => -32602 [message] => Invalid params [data] => ) ) ~~~