The first
argument specifies the type of the filter to load and can be one
of the following: 'pre', 'post', or 'output'. The second argument
specifies the name of the filter plugin, for example, 'trim'.
Example 13-1. loading filter plugins
<?php
// load prefilter named 'trim' $smarty->load_filter('pre', 'trim');
// load another prefilter named 'datefooter' $smarty->load_filter('pre', 'datefooter');
// load output filter named 'compress' $smarty->load_filter('output', 'compress');