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如何在smarty中增加类似foreach的功能自动加载数据_php技巧

May 17, 2016 am 08:58 AM
foreach smarty

在smarty中使用自定义插件来加载数据(见:编写Smarty插件在模板中直接加载数据的详细介绍),在使用的时候还是感觉不够方便,灵机一动就想写成类似foreach那种标签:

第一步:在Smarty_Compiler.class.php的_compile_tag函数中增加:

复制代码 代码如下:

//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 "";
 break;

第二步:增加一个方法:
复制代码 代码如下:

/**
* 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);
}

这样就可以在模板中使用load这个标签了。用法例如:
复制代码 代码如下:

{load table="test" where="`id`   ...
{/load}

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