数组自定义排序?
<br />Array<br />(<br /> [ban] => Array<br /> (<br /> [0] => Array<br /> (<br /> [id] => 1<br /> [uid] => 1<br /> [username] => admin <br /> [posttime] => 2014-07-19 11:54<br /> )<br /> )<br /> <br /> [ale] => Array<br /> (<br /> [0] => Array<br /> (<br /> [id] => 2<br /> [uid] => 1<br /> [username] => admin<br /> [posttime] => 2014-07-19 12:02<br /> ) <br /> )<br /> [text] => Array<br /> (<br /> [0] => Array<br /> (<br /> [id] => 5<br /> [uid] => 1<br /> [username] => admin<br /> [posttime] => 2014-07-19 12:02<br /> ) <br /> )<br />)<br />