Question

Smarty {call} built-in function is able to call a template function defined by the {function} tag. Now, I need to call a template function but inside a plugin function because I only know the function name inside the plugin.

Plugin function:

<?php

$smarty->registerPlugin('function', 'form_label', 'renderFormLabel');

function renderFormLabel($form, \Smarty_Internal_Template $template) {

    // find out which function to call based on the available ones
    $function = lookupTemplateFunction($template);

    $args = $form->getVariables();

    // How to call the Smarty template function with the given $args?
    // $html = $template->smarty->???($args); 

    //return $html;
}

Template:

<form action="submit.php" method="post">
    {form_label}
    ....
</form>

This is an effort to support Symfony2 Forms in SmartyBundle. Each form fragment is represented by a Smarty function. To customize any part of how a form renders, the user just needs to override the appropriate function.

Answer 1

I should have been more specific in my first answer. The code for the renderFormLabel should look like this:

function renderFormLabel($form, \Smarty_Internal_Template $template) {

    // find out which function to call based on the available ones
    $function = lookupTemplateFunction($template);

    if ($template->caching) {
        Smarty_Internal_Function_Call_Handler::call ('test',$template,$form,$template->properties['nocache_hash'],false);
    } else {
        smarty_template_function_test($template,$form);
    }
}

In this case the attributes(paramter) passed to the renderFormLabel plugin by the $form array will be seen as local template variables inside the template function.