Stop Indexing in Magento

class.php

<?php
class Klasse {
public static function switchIndexingOff() {
	$processes = Mage::getSingleton('index/indexer')->getProcessesCollection();
	$processes->walk('setMode', array(Mage_Index_Model_Process::MODE_MANUAL));
	$processes->walk('save');
    }

    public static function rebuildIndices() {
	$processes = Mage::getSingleton('index/indexer')->getProcessesCollection();
	$processes->walk('reindexAll');
	$processes->walk('setMode', array(Mage_Index_Model_Process::MODE_REAL_TIME));
	$processes->walk('save');
    }
}

I like how you used the walk method, should be used more often in Magento (low memory etc.). Cool thing with the walk method you can pass an anonymous function into it, like so:

<?php
$collection->walk(function($item, $secondArgument){
    //do stuff here
}, array('secondArgument'));

can you tell me how can i implement this in my project.