二维数组相同数组的字段 合并

array(10) {  [0]=>  array(5) {    ["times"]=>    string(10) "2016-10-26"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "2"    ["id"]=>    string(1) "2"    ["username"]=>    string(6) "李四"  }  [1]=>  array(5) {    ["times"]=>    string(10) "2016-10-26"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "6"    ["id"]=>    string(1) "6"    ["username"]=>    string(6) "小辉"  }  [2]=>  array(5) {    ["times"]=>    string(10) "2016-10-25"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "7"    ["id"]=>    string(1) "7"    ["username"]=>    string(6) "小明"  }  [3]=>  array(5) {    ["times"]=>    string(10) "2016-10-26"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "6"    ["id"]=>    string(1) "6"    ["username"]=>    string(6) "小辉"  }  [4]=>  array(5) {    ["times"]=>    string(10) "2016-10-24"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "8"    ["id"]=>    string(1) "8"    ["username"]=>    string(6) "小飞"  }  [5]=>  array(5) {    ["times"]=>    string(10) "2016-10-24"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(2) "12"    ["id"]=>    NULL    ["username"]=>    NULL  }  [6]=>  array(5) {    ["times"]=>    string(10) "2016-10-23"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(2) "11"    ["id"]=>    string(2) "11"    ["username"]=>    string(6) "小小"  }  [7]=>  array(5) {    ["times"]=>    string(10) "2016-10-26"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(2) "14"    ["id"]=>    string(2) "14"    ["username"]=>    string(6) "小六"  }  [8]=>  array(5) {    ["times"]=>    string(10) "2016-10-25"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "2"    ["id"]=>    string(1) "2"    ["username"]=>    string(6) "李四"  }  [9]=>  array(5) {    ["times"]=>    string(10) "2016-10-26"    ["aid"]=>    string(1) "1"    ["uid"]=>    string(1) "2"    ["id"]=>    string(1) "2"    ["username"]=>    string(6) "李四"  }}        //通过那个字段合并的 这里我是通过times  把我要的username及id合并       $res = array();        foreach($ar as $item) {          if(! isset($res[$item['times']])) {              $res[$item['times']] = $item;           } else{               $res[$item['times']]['username'].= ',' . $item['username'];               $res[$item['times']]['uid'].= ',' . $item['uid'];           }        }        $res=array_values($res);         //把username，uid数据分割开          $data=$res;          foreach($res as $key=>$val){                  $res[$key]['username']=explode(',',$val['username']);                  $res[$key]['uid']=explode(',',$val['uid']);          }        //把username，uid；重复的值去除掉         $obj=array();          foreach($res as $key=>$val){               $obj[$key]['username']=array_unique($val['username']);               $obj[$key]['uid']=array_unique($val['uid']);          }        //然后放到我们原先的数组内           $da=array();          foreach($data as $k=>$v){                $da[$k]=$v;                $da[$k]['users']=implode(',',$obj[$k]['username']);                $da[$k]['uid']=implode(',',$obj[$k]['uid']);                      }
         这就像咱们最后想要的数据。
         最后 ，到我们的视图层循环展示