magento--------------输出content前字符过滤处理，现在字母个数处理

1.
public function getContent($limit = 0)
{
//process page
$helper = Mage::helper('cms');
$processor = $helper->getPageTemplateProcessor();
$html = $processor->filter($this->getData("content"));
if($limit)
return $this->html_cut_text($this->strip_html_tags($html), $limit);
else
return ($html);
}

2.
//是一个过滤函数。
$processor = $helper->getPageTemplateProcessor();
$html = $processor->filter($this->getData("content"));
2.1
public function getPageTemplateProcessor()
{
$model = (string)Mage::getConfig()->getNode(self::XML_NODE_PAGE_TEMPLATE_FILTER);
return Mage::getModel($model);
}
2.1.1
const XML_NODE_PAGE_TEMPLATE_FILTER = 'global/cms/page/tempate_filter';
2.1.2
<global>
<cms>
<page>
<tempate_filter>cms/template_filter</tempate_filter>
</page>
</cms>
</global>
//故Mage::getModel($model)得到的是Mage/cms/model/template/filter.php




3.
//处理内容，如果$limit为100，则抓取前面100个字母，用于简介等内容实用
return $this->html_cut_text($this->strip_html_tags($html), $limit);