smarty/docs/programmers/api-variables/variable-default-template-handler-func.md

$default_template_handler_func

This function is called when a template cannot be obtained from its resource.

Note

The default handler is currently only invoked for file resources. It is not triggered when the resource itself cannot be found, in which case a \Smarty\Exception is thrown.

<?php

$smarty = new Smarty();
$smarty->default_template_handler_func = 'my_default_template_handler_func';

/**
 * Default Template Handler
 *
 * called when Smarty's file: resource is unable to load a requested file
 * 
 * @param string   $type     resource type (e.g. "file", "string", "eval", "resource")
 * @param string   $name     resource name (e.g. "foo/bar.tpl")
 * @param string  &$content  template's content
 * @param integer &$modified template's modification time
 * @param Smarty   $smarty   Smarty instance
 * @return string|boolean   path to file or boolean true if $content and $modified 
 *                          have been filled, boolean false if no default template 
 *                          could be loaded
 */
function my_default_template_handler_func($type, $name, &$content, &$modified, Smarty $smarty) {
    if (false) {
        // return corrected filepath
        return "/tmp/some/foobar.tpl";
    } elseif (false) {
        // return a template directly
        $content = "the template source";
        $modified = time();
        return true;
    } else {
        // tell smarty that we failed
        return false;
    }
}

?>