Php 如何发送sql以使用magento寻呼机

我已经创建了一个新的数据库来提供自定义订单列表

我用SQL代码PS$SQL给出数据库显示是多行的

  $sql = select * from database_name WHERE customfilter like $customfilter limit $startfrom, $limit
    $result = mysqli_query($cn,$sql)
    $collection = mysqli_fetch_array($result)

我不知道该编辑哪个代码。我试图编辑产品页面上的代码以用于此页面，但它给出了错误

谁能建议我编辑哪种代码来使用寻呼机

下面是我尝试的代码

$this->getCollection($collection);
$pager = $this->getLayout()->createBlock('page/html_pager', 'ordercustom.pager')
        ->setCollection($this->getCollection()); 
    $this->setChild('pager', $pager);
    return $this;

---

但它显示错误。

请查看以下产品集合代码并设置页面大小限制

$collection  = Mage::getModel ('catalog/product')
                    ->getCollection()                       -
                    ->addAttributeToSelect('*')
                    ->setPageSize($this->getRequest()->getParam("limit"))
                    ->load();

请采用上面的客户收集页面大小，并让我知道

$collection  = Mage::getModel ('customorder/index')
                        ->getCollection()
                        ->addAttributeToSelect('*')
                        ->addAttributeToFilter('customer_code', $customercode)
                        ->addAttributeToFilter('shipping', array('eq' => $shipping))
                        ->setPageSize($this->getRequest()->getParam("limit"))
                        ->load();
            $this->setCollection($collection);

它显示致命错误：对非对象调用成员函数getCollection（）

PS

customorder/index位于my customorder.xml中

<block type="customorder/index" name="customorder" template="customorder/index.phtml"/>

在前端

echo$this->getPagerHtml（）

---

我这个页面的类是class Custom_Customorder_Block_Index extensed Mage_Core_Block_Template{我想你错过了该模型的集合类。请从

    parent::__construct();
    $collection  = Mage::getModel ('ordercustom/index')
    ->getCollection()                       -
    ->addAttributeToSelect('*')
    ->addAttributeToFilter('customer_code', array('eq' => $customercode))
    ->addAttributeToFilter('shipping', array('eq' => $shipping))
    ->setPageSize($this->getRequest()->getParam("limit"))
    ->load();
    $this->setCollection($collection);
    } 

protected function _prepareLayout()
        {
            parent::_prepareLayout();

        $pager = $this->getLayout()->createBlock('page/html_pager', 'customorder.pager');
        $pager->setAvailableLimit(array(5=>5,10=>10,20=>20,'all'=>'all'));
        $pager->setCollection($this->getCollection());
        $this->setChild('pager', $pager);
        $this->getCollection()->load();
        return $this;
    }

    public function getPagerHtml()
        {
            return $this->getChildHtml('pager');
        }