php根据字母进行数组排序，下面是具体的实例： var cityList=[{ "enValue": "shijiazhuang", "key": 37, "sort": 0, "value": "石家庄市"}, { "enValue": "tangshan", "key": 61, "sort": 0, "value": "唐山市"}, { "enValue": "qinhuangdao", "key": 77, "sort": 0, "value": "秦皇岛市"}]function letterSo
