If you pass this particular function a user id, it returns all the posts made by that user in reverse-chronological order, all bundled in a nice, multidimensional array.
如果为这个函数传递一个用户ID，它将在一个多维数组中按日期倒序的顺序返回那个用户发出的贴子。
The krsort() function sorts an array by the keys in reverse order. The values keep their original keys.
函数的作用是：对数组按照键名逆向排序，元素的键名保持不变。
The krsort() function sorts an array by the keys in reverse order. The values keep their original keys.
函数的作用是：对数组按照键名逆向排序，元素的键名保持不变。
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