How to use smarty filter

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1. Pre-filter

Function remove_dw_comments ($tpl_source, & $smarty) {return preg_replace ("/ / U", ", $tpl_source); / / remove the comments from the original tpl file so that it does not show} / / register the pre-filter $smarty- > register_prefilter (" remove_dw_comments "); $smarty- > display (" test1.tpl ") in the compiled file.

Test1.tpl

And the use of filters

Format of the comment

In this way, comments are filtered out in the compiled file

2. Rear filter

Function add_header_comment ($tpl_source, & $smarty) {return "\ n". $tpl_source; / / add header comments} / / filter $smarty- > register_postfilter ("add_header_comment") after registration; $smarty- > display ('test2.tpl')

Template file:

Test2.tpl

The header generates a comment:

3. Output filter

Function protect_email ($tpl_output, & $smarty) {$tpl_output = preg_replace ('! (\ S+) @ ([a-zA-Z0-9\.\ -] +\. ([a-zA-Z] {2 a-zA-Z 3} | [0-9] {1 # 3}))!,'$1% 40 $2 million, $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"); above is all the content of the article "how to use smarty filter". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!