A simple MODX output filter to convert TV code to value

checkCode.php

<?php
/*
 * checkCode : A simple MODX output filter to convert TV code to value - (c) 2012 ackwa.fr 
 *
 * @version : 1.0.0
 * @see     : https://gist.github.com/gists/3487008
 * @name    : checkCode.php
 * @author  : g.noel@ackwa.fr
 * @usage   : myTV : First==1||Second==2||Third==3
 *
 *          [[+myTV]]           -> 1    , 2     , 3
 *          [[+myTV:checkCode]] -> First, Second, Third
 *
 * @history : 24/06/12 - 1.0.0 - Initial revision
 *
 * Extract Data
 */
$iPos     = strpos($name, '.');
$sName    = substr($name, ((false === $iPos) ? 0 : $iPos + 1));
$oTV      = $modx->getObject('modTemplateVar', array('name'=> $sName));
$lOptions = explode('||', ($oTV->elements ? $oTV->elements : ''));
$sValue   = '';

/*
 * Convert code -> Value
 */
foreach($lOptions as $aOption) {
    $lValue = explode('==', $aOption);
    if ($input == $lValue[1]) {
        $sValue = $lValue[0];
        break;
    }
}

return $sValue;