麻烦大佬支招，2 个数组合并后怎么翻页 [ 2.0 版本 ]

public function getxiaohei_top5() {
    $a1=array();
    $a2=array();
    $a1=$this->sql->from('account')
        ->select(['id','name','beizhu'])
        ->where('`lock`= :lock',[':lock'=>1])
        ->limit(5)
        ->orderBy(['reg_date'=>SORT_DESC])
        ->all();

    $a2=$this->sql->from('account')
        ->select(['id','name','beizhu'])
        ->where('`lock`= :lock',[':lock'=>1])
        ->limit(5)
        ->orderBy(['reg_date'=>SORT_DESC])
        ->all(Yii::$app->db2);
    return array_merge($a1,$a2);//合并数组
}

public function getxiaohei() {
    $sql = new \yii\db\Query();
    $countu2 = $sql->from('account')
        ->where('`lock`= :lock',[':lock'=>1])->select('COUNT(*)')
        ->all();
    $newspagination = new \yii\data\Pagination([
        'totalCount'=> $countu2[0]['COUNT(*)'],
        'defaultPageSize' => 20
    ]);

    $sql2= new \yii\db\Query();
    $info = $sql2->from('account')
        ->select(['id','name','beizhu'])
        ->where('`lock`= :lock',[':lock'=>1])
        ->limit($newspagination->limit)
        ->offset($newspagination->offset)
        ->orderBy(['reg_date'=>SORT_DESC])
        ->all();
    return array($info,$newspagination);
}