bootstrapping - Zend Framework: How to call a custom function created in bootstrap? -

i using zend framework v 1.10

i have created custom function in bootstrap file:

<?php  class bootstrap extends zend_application_bootstrap_bootstrap {      public function init(){   }      public function helloworld(){ echo 'hello';} } ?> 

how call helloworld() function action within index controller?

any appreciated.

thanks

anyone can call function in bootstrap class without making object of class. bootstrap automatically calls custom functions have _init keyword prefix. such as:

public function _initindia() {       echo 'proud indian';  }