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后置过滤器

模板的后置过滤器是当模板被编译后时执行的PHP函数。 后置过滤器可以通过注册过滤器来调用, 或者放置到插件目录中,用 loadFilter()函数或者 设置 $autoload_filters来调用。 Smarty把编译后的代码作为第一个参数传递到函数中,并期待函数返回经过处理的代码。

Example 17.12. 使用后置过滤器


<?php
// 在PHP程序中
function add_header_comment($tpl_source, Smarty_Internal_Template $template)
{
    return "<?php echo \"<!-- Created by Smarty! -->\n\"; ?>\n".$tpl_source;
}

// 注册后置过滤器
$smarty->registerFilter('post','add_header_comment');
$smarty->display('index.tpl');
?>

  

上面的后置过滤器把编译后的index.tpl的代码变成这样:


<!-- Created by Smarty! -->
{* rest of template content... *}

  

参见 registerFilter(), 前置过滤器, 输出过滤器, 和 loadFilter().

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