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');
    }
}

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