Fluid ViewHelper for str_replace

ReplaceStringViewHelper.php

<?php
/**
 * Replacement viewhelper
 *
 * @package lars_development
 * @license http://www.gnu.org/licenses/gpl.html GNU General Public License, version 3 or later
 */
class Tx_ExtensionName_ViewHelpers_ReplaceStringViewHelper extends Tx_Fluid_Core_ViewHelper_AbstractViewHelper {
	/**
	 * Replace the $searchFor string with $replaceString in $string
	 *
	 * @param $string string
	 * @param $searchFor string
	 * @param $replaceWith string
	 * @return string
	 */
	public function render($string, $searchFor, $replaceWith) {
		return str_replace($searchFor, $replaceWith, $string);
	}
}
?>

template.html

{namespace t=Tx_ExtensionName_ViewHelpers}

<t:ReplaceString string="Hello world" searchFor="world" replaceWith="universe" />