Traditionally, programming templates into your applications goes as
follows: First, you accumulate your variables within your PHP
application, (maybe with database queries.) Then, you instantiate your
Smarty object, assign()
the variables and display()
the template. So lets
say for example we have a stock ticker on our template. We would
collect the stock data in our application, then assign these variables
in the template and display it. Now wouldn't it be nice if you could
add this stock ticker to any application by merely including the
template, and not worry about fetching the data up front?
You can do this by writing a custom plugin for fetching the content and assigning it to a template variable.
Example 18.7. componentized template
function.load_ticker.php -
drop file in
$plugins directory
<?php
// setup our function for fetching stock data
function fetch_ticker($symbol)
{
// put logic here that fetches $ticker_info
// from some ticker resource
return $ticker_info;
}
function smarty_function_load_ticker($params, &$smarty)
{
// call the function
$ticker_info = fetch_ticker($params['symbol']);
// assign template variable
$smarty->assign($params['assign'], $ticker_info);
}
?>
index.tpl
{load_ticker symbol='SMARTY' assign='ticker'}
Stock Name: {$ticker.name} Stock Price: {$ticker.price}
See also
{include_php},
{include}
and
{php}.