数组如下：
$array =
array (
0 =>
array (
'day' => '2014-2-25',
'general_data' =>
array (
0 =>
array (
'uid' => 30015,
'eff' => 1,
),
1 =>
array (
'uid' => 30566,
'eff' => 33,
),
2 =>
array (
'uid' => 30624,
'eff' => 30,
),
3 =>
array (
'uid' => 30646,
'eff' => 1,
),
4 =>
array (
'uid' => 30674,
'eff' => 1,
),
5 =>
array (
'uid' => 30632,
'eff' => 1,
),
),
),
1 =>
array (
'day' => '2014-2-26',
'general_data' =>
array (
0 =>
array (
'uid' => 30015,
'eff' => 1,
),
),
),
2 =>
array (
'day' => '2014-2-27',
'general_data' =>
array (
0 =>
array (
'uid' => 30015,
'eff' => 42,
),
1 =>
array (
'uid' => 30688,
'eff' => 1,
),
2 =>
array (
'uid' => 30689,
'eff' => 9,
),
3 =>
array (
'uid' => 30690,
'eff' => 1,
),
4 =>
array (
'uid' => 30340,
'eff' => 1,
),
5 =>
array (
'uid' => 30341,
'eff' => 11,
),
6 =>
array (
'uid' => 30692,
'eff' => 6,
),
),
),
3 =>
array (
'day' => '2014-2-28',
'general_data' =>
array (
0 =>
array (
'uid' => 30692,
'eff' => 8,
),
1 =>
array (