我的问题是: 我有一个mysql表:events并希望获得特殊格式的json_string。
id event
1 2010-01-01 00:00:00
2 2010-07-02 00:00:00
3 2011-01-04 00:00:00
4 2012-01-30 00:00:00
5 2012-03-15 00:00:00
...
我需要获取json字符串:
{"events":[
{"2010":
{
"1":{"id":1,"event":2010-01-01 00:00:00},
"7":{"id":2,"event":2010-07-02 00:00:00}
},
},
{"2011:
{
"1":{"id":3,"event":2012-01-30 00:00:00}
},
},
{"2012:
{
"1":{"id":4,"event":2011-01-04 00:00:00},
"3":{"id":5,"event":2012-03-15 00:00:00},
},
}
]}
我的代码如下:
$result = DB::query('SELECT id, event FROM events');
$events = array();
while($event = $result->fetch_object()) {
// the following statement won't get desired results
$events[] = $event;
}
return array(
'events' => json_encode($events);
);
如何更改代码以获取上述JSON字符串?
答案 0 :(得分:1)
只需substr()
从事件日期开始所需的部分,并使用它来构建多维数组:
while($event = $result->fetch_object()) {
$year = substr($event->event, 0, 4);
$month = (int)substr($event->event, 5, 2);
$events[$year][$month][] = $event;
}