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smarty高级特性之过滤器的使用方法,

本文实例分析了smarty高级特性之过滤器的使用方法。分享给大家供大家参考,具体如下:

高级特性中过滤器的使用

1、预过滤器

function remove_dw_comments($tpl_source, &$smarty)
{
 return preg_replace("/<!--#.*-->/U","",$tpl_source);
 //去除原tpl文件中的注释,使其在编译后的文件中不显示
}
//注册预过滤器
$smarty->register_prefilter("remove_dw_comments");
$smarty->display("test1.tpl");

test1.tpl

与过滤器的使用


  注释的格式
这样的话,注释在编译后的文件中被过滤掉

2、后过滤器

function add_header_comment($tpl_source, &$smarty)
{
 return "<&#63;php echo \"<!-- Created by Smarty! -->\n\" &#63;>\n".$tpl_source;
 //添加头部注释
}
//注册后过滤器
$smarty->register_postfilter("add_header_comment");
$smarty->display('test2.tpl');

模板文件:

test2.tpl

头部会产生注释:

3、输出滤镜

function protect_email($tpl_output, &$smarty){
  $tpl_output = preg_replace('!(\S+)@([a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,3}|[0-9]{1,3}))!', '$1%40$2', $tpl_output);
  return $tpl_output;}// register the outputfilter$smarty->register_outputfilter("protect_email");
  $smarty->display("index.tpl");
}
$smarty->register_outputfilter("protect_email");
$smarty->display("index.tpl");

希望本文所述对大家基于smarty模板的PHP程序设计有所帮助。

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