register_function(),
unregister_function().
Example 16-1. function plugin with output例16-1：有输出插件函数
<?PHP
/*
* smarty plugin
* -------------------------------------------------------------
* File: function.eightball.php
* Type: function
* Name: eightball
* Purpose: outputs a ranDOM magic answer
* -------------------------------------------------------------
*/
function smarty_function_eightball($params, &$smarty)
{
$answers = array('Yes',
'No',
'No way',
'Outlook not so good',
'Ask again soon',
'Maybe in your reality');
$result = array_rand($answers);
return $answers[$result];
}
?>
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which can be used in the template as:
在模板中调用方法如下：
Question: Will we ever have time travel?
Answer: {eightball}.
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Example 16-2. function plugin without output例16-2：无输出插件函数
<?php
/*
* Smarty plugin
* -------------------------------------------------------------
* File: function.assign.php
* Type: function
* Name: assign
* Purpose: assign a value to a template variable
* -------------------------------------------------------------
*/
function smarty_function_assign($params, &$smarty)
{
extract($params);
if (empty($var)) {
$smarty->trigger_error("assign: missing 'var' parameter");
return;
}
if (!in_array('value', array_keys($params))) {
$smarty->trigger_error("assign: missing 'value' parameter");
return;
}
$smarty->assign($var, $value);
}
?>
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