PHP MVC with .NET like controller

<?php
/**
 * Smarty Internal Plugin Compile Function Plugin
 *
 * Compiles code for the execution of function plugin
 *
 * @package Smarty
 * @subpackage Compiler
 * @author Uwe Tews
 */

/**
 * Smarty Internal Plugin Compile Function Plugin Class
 *
 * @package Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Private_Function_Plugin extends Smarty_Internal_CompileBase {

    /**
     * Attribute definition: Overwrites base class.
     *
     * @var array
     * @see Smarty_Internal_CompileBase
     */
    public $required_attributes = array();
    /**
     * Attribute definition: Overwrites base class.
     *
     * @var array
     * @see Smarty_Internal_CompileBase
     */
    public $optional_attributes = array('_any');

    /**
     * Compiles code for the execution of function plugin
     *
     * @param array $args array with attributes from parser
     * @param object $compiler compiler object
     * @param array $parameter array with compilation parameter
     * @param string $tag name of function plugin
     * @param string $function PHP function name
     * @return string compiled code
     */
    public function compile($args, $compiler, $parameter, $tag, $function)
    {
        // This tag does create output
        $compiler->has_output = true;

        // check and get attributes
        $_attr = $this->getAttributes($compiler, $args);
        if ($_attr['nocache'] === true) {
            $compiler->tag_nocache = true;
        }
        unset($_attr['nocache']);
        // convert attributes into parameter array string
        $_paramsArray = array();
        foreach ($_attr as $_key => $_value) {
            if (is_int($_key)) {
                $_paramsArray[] = "$_key=>$_value";
            } else {
                $_paramsArray[] = "'$_key'=>$_value";
            }
        }
        $_params = 'array(' . implode(",", $_paramsArray) . ')';
        // compile code
        $output = "<?php echo {$function}({$_params},\$_smarty_tpl);?>\n";
        return $output;
    }

}

?>