How to add PHP code to .tpl file [duplicate]

Answer 1

You shouldn't add PHP code to the template. It will make whole idea of templates spoiled.

You have to add PHP code to controller, not template.

Answer 2

There is a best practise guide on smarty homepage. #1 is Do not embed PHP!

http://www.smarty.net/best_practices

Try this: {include_php file="/path/to/somefile.php"}

But notice:

{include_php} is deprecated from Smarty, use registered plugins 
to properly insulate presentation from the application code. 
As of Smarty 3.1 the {include_php} tags are only available 
from SmartyBC.

So best way is to write a smarty plugin as explained by rodneyrehm

Answer 3

{php} has been deprecated. Have a look at Extending Smarty With Plugins.

put the follwing in …/plugins/function.yourplugin.php:

<?php
function smarty_function_yourplugin(array $params, Smarty_Template_Instance) {
    include 'your_other_file.php';
}

and use in your template:

{yourplugin}