//加载数据的开始标签
case 'load':
$this->_push_tag('load');
return $this->_complie_load_start($tag_args);
break;
//加载数据的结束标签
case '/load':
$this->_pop_tag('load');
return "<?php endforeach; endif; unset(/$_from); ?>";
break;

/**
* 加载数据
* @param $tag_args
*/
function _complie_load_start($tag_args)
{
$key = substr(md5($tag_args), 8, 16); //根据参数生成一个特殊的变量名
$attrs = $this->_parse_attrs($tag_args);
//这里可以增加更多的处理
$class = (!isset($attrs['class']) || empty($attrs['class'])) ? 'cls_crud' : trim($attrs['class']);
(!isset($attrs['table']) || empty($attrs['table'])) && exit('`table` is empty!');
$db = $class::factory(array('table' => substr($attrs['table'], 1, -1)));
//定义新变量
$this->_tpl_vars[$key] = $db->get_block_list(array(substr($attrs['where'], 1, -1)), $attrs['limit']);
$tag_args = "from=/${$key} " . $tag_args;

//调用foreach标签处理函数进行处理
return $this->_compile_foreach_start($tag_args);
}