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# register_function

register_function --

##

void register_function ( string name, mixed impl, bool cacheable, mixed cache_attrs)

Use this to dynamically register template function plugins. Pass in the template function name, followed by the PHP function name that implements it.

The php-function callback `impl` can be either (a) a string containing the function name or (b) an array of the form `array(&$object, $method)` with `&$object` being a reference to an object and `$method` being a string containing the mehod-name or (c) an array of the form `array(&$class, $method)` with `$class` being a classname and `$method` being a class method of that class.

`cacheable` and `cache_attrs` can be omitted in most cases. See Controlling Cacheability of Plugins' Output on how to use them properly.

Example 1. register_function
`<?php $smarty->register_function("date_now", "print_current_date"); function print_current_date($params) { if(empty($params['format'])) { $format = "%b %e, %Y"; } else { $format = $params['format']; return strftime($format,time()); } } // now you can use this in Smarty to print the current date: {date_now} // or, {date_now format="%Y/%m/%d"} to format it. ?>`

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