二维数组

工作中遇到个问题，数据来自于excel，读取出来是二维数组，需要按照指定字段排序，类似于sql的order by功能，折腾了一会儿，代码如下： class demo { public function test() { $arr = array( array( 'power' => 380, 'day' => 1, 'where' => 1, ), array( 'power' => 380, 'day' => 2, 'where' => 1, ), array( 'power' => 400, 'day' => 1, 'where' => 1, ), array( 'power' => 380, 'day' => 3, 'where' => 1, ), array( 'power' => 400, 'day' => 2, 'where' => 1, ), array( 'power' => 380, 'day' => 8, 'where' => 1, ), array( 'power' => 380, 'day' => 8, 'where' => 2, ), array( 'power' => 500, 'day' => 1, 'where' => 1, ), array( 'power' => 380, 'day' => 11, 'where' => 1, ), array(

项目中遇到的一个实际问题，日志如下 2013-09-13 00:06:09:adid:10000254 2013-09-13 00:06:14:adid:10000254 2013-09-13 00:06:43:adid:10000253 2013-09-13 00:06:48:adid:10000254 2013-09-13 00:07:07:adid:10000254 2013-09-13 00:07:12:adid:10000254 2013-09-13 00:07:19:adid:10000254 2013-09-13 00:07:32:adid:10000254 2013-09-13 00:08:05:adid:10000254 2013-09-13 00:08:20:adid:10000240 2013-09-13 00:08:28:adid:10000253 2013-09-13 00:08:32:adid:10000253 2013-09-13 00:08:41:adid:10000254 2013-09-13 00:09:02:adid:10000253 2013-09-13 00:09:10:adid:10000254 2013-09-13 00:09:11:adid:10000240 2013-09-13 00:09:18:adid:10000254 2013