从数据库的一张表中获取了一个数组，为便于分析进行了切割，切割后数组如下：
$arr = array(
0 =>
array(
'uid' => 5,
'username' => '',
'password' => '',
'user_status' => 1,
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '13863810574',
'realname' => '汪精卫',
'level' => '普通会员',
'trade_account' => '568050269',
'reg_time' => null,
'recom_account' => '243556',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
),
1 =>
array(
'uid' => '6',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18807556392',
'realname' => '周杰伦',
'level' => '普通会员',
'trade_account' => '12435356',
'reg_time' => null,
'recom_account' => '243556',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
),
2 =>
array(
'uid' => '7',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18316850912',
'realname' => '奥巴马',
'level' => '普通会员',
'trade_account' => '83475535',
'reg_time' => null,
'recom_account' => '834755351',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
),
3 =>
array(
'uid' => '8',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879126845',
'realname' => '大卫',
'level' => '普通会员',
'trade_account' => '834755351',
'reg_time' => null,
'recom_account' => '154548',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
),
4 =>
array(
'uid' => '9',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879701814',
'realname' => '黄建',
'level' => '普通会员',
'trade_account' => '154548',
'reg_time' => null,
'recom_account' => '568050269',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
),
5 =>
array(
'uid' => '10',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879701814',
'realname' => '张科',
'level' => '普通会员',
'trade_account' => '9527',
'reg_time' => null,
'recom_account' => '568050269',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
),
);现在想对该多维数组进行处理，规则为：当a键的recom_account的值等于b键的trade_account时，则a键值对为b键值对的直接子分类，当c键的recom_account等于a键的trade_account时，则c键值对为b键值对的间接子分类，每个键值对(分类)可以有多个直接子分类，但只对应一个直接父分类，也就是trade_account是唯一的，recom_account不是唯一的。期望返回的结果是：每个键值对增加一个count键，其值为所有直接子分类的个数，一个childlist键，其值为一个多维数组，记录子分类的所有信息，一个total_count键，其值为所有子分类的个数。haschild字段为1表示该分类有子分类(包括直接子分类与间接子分类),为0则没有子分类。如上面的数组，期望生成如下的格式。
$list = array(
0 =>
array(
'uid' => 5,
'username' => '',
'password' => '',
'user_status' => 1,
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '13863810574',
'realname' => '汪精卫',
'level' => '普通会员',
'trade_account' => '568050269',
'reg_time' => null,
'recom_account' => '243556',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
'count' => '2',
'total_count' => '4',
'childlist' => array(
9 => array(//9为子分类的uid
'uid' => '9',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879701814',
'realname' => '黄建',
'level' => '普通会员',
'trade_account' => '154548',
'reg_time' => null,
'recom_account' => '568050269',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
'count' => 1,
'total_count' => 2,
'childlist' => array(
8 => array(
'uid' => '8',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879126845',
'realname' => '大卫',
'level' => '普通会员',
'trade_account' => '834755351',
'reg_time' => null,
'recom_account' => '154548',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
'count' => 1,
'total_count'=>1,
'childlist' => array(
7 => array(//7为子分类的uid
'uid' => '7',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18316850912',
'realname' => '奥巴马',
'level' => '普通会员',
'trade_account' => '83475535',
'reg_time' => null,
'recom_account' => '834755351',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
'count' => 0,
'total_count' => 0,
'childlist' => null,
)
)
)
)
),
10 => array(
'uid' => '10',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879701814',
'realname' => '张科',
'level' => '普通会员',
'trade_account' => '9527',
'reg_time' => null,
'recom_account' => '568050269',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
'count' => 0,
'total_count' => 0,
'childlist' => null,
),
)
),
1 =>
array(
'uid' => '6',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18807556392',
'realname' => '周杰伦',
'level' => '普通会员',
'trade_account' => '12435356',
'reg_time' => null,
'recom_account' => '243556',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
'count' => 0,
'total_count' => 0,
'childlist' => null,
),
2 =>
array(
'uid' => '7',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18316850912',
'realname' => '奥巴马',
'level' => '普通会员',
'trade_account' => '83475535',
'reg_time' => null,
'recom_account' => '834755351',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
'count' => 0,
'total_count' => 0,
'childlist' => null,
),
3 =>
array(
'uid' => '8',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879126845',
'realname' => '大卫',
'level' => '普通会员',
'trade_account' => '834755351',
'reg_time' => null,
'recom_account' => '154548',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
'count' => 0,
'total_count' => 0,
'childlist' => null,
),
4 =>
array(
'uid' => '9',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879701814',
'realname' => '黄建',
'level' => '普通会员',
'trade_account' => '154548',
'reg_time' => null,
'recom_account' => '568050269',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '1',
'count' => 0,
'total_count' => 0,
'childlist' => null,
),
5 =>
array(
'uid' => '10',
'username' => '',
'password' => '',
'user_status' => '1',
'login_number' => null,
'last_login_time' => null,
'last_login_ip' => null,
'nickname' => '',
'mobile' => '18879701814',
'realname' => '张科',
'level' => '普通会员',
'trade_account' => '9527',
'reg_time' => null,
'recom_account' => '568050269',
'total' => null,
'is_apply' => '0',
'is_checked' => '0',
'haschild' => '0',
'count' => 0,
'total_count' => 0,
'childlist' => null,
),
);
已参考http://www.thinkphp.cn/topic/...进行调试，但未成功获取返回值。