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Template Functions

void smarty_function_name( $params,  
  &$smarty);  
array $params;
object &$smarty;
 

All attributes passed to template functions from the template are contained in the $params as an associative array.

The output (return value) of the function will be substituted in place of the function tag in the template, eg the {fetch} function. Alternatively, the function can simply perform some other task without any output, eg the {assign} function.

If the function needs to assign some variables to the template or use some other Smarty-provided functionality, it can use the supplied $smarty object to do so eg $smarty->foo().

Example 16.1. function plugin with output


<?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];
}
?>


which can be used in the template as:

Question: Will we ever have time travel?
Answer: {eightball}.
    

Example 16.2. function plugin without output


<?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)
{
    if (empty($params['var'])) {
        $smarty->trigger_error("assign: missing 'var' parameter");
        return;
    }

    if (!in_array('value', array_keys($params))) {
        $smarty->trigger_error("assign: missing 'value' parameter");
        return;
    }

    $smarty->assign($params['var'], $params['value']);
}
?>

      


See also: register_function(), unregister_function().

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