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Template postfilters are PHP functions that your templates are ran through after they are compiled. Postfilters can be either registered or loaded from the plugins directory by using load_filter() function or by setting $autoload_filters variable. Smarty will pass the compiled template code as the first argument, and expect the function to return the result of the processing.

模板后过滤器是一些PHP函数,模板就是在那些函数编译后才运行。后过滤器同样能够通过 load filter() 函数和设置 $autoload filters 变量来注册或者从工具目录里载入。SMARTY将传递模板输出作为第一个参数,通过自定义函数返回处理结果。


Example 15-3. using a template postfilter

// put this in your application
function add_header_comment($tpl_source, &$smarty)
    return "<?php echo \"<!-- Created by Smarty! -->\n\" ?>\n".$tpl_source;

// register the postfilter

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