List template variable modx evo

list.snippet.php

<?php
/*usage: [[ list? &tvname=`param` &class=`myclass` &name=`myname` &docid=`N` ]] */	

$doc = isset($docid) ? $docid : $modx->documentIdentifier;
$class = isset($class) ? $class : "";
$name = isset($name) ? $name : "";
$input = $modx->getTemplateVar($tvname,'*',$doc)['value'];

$vals = explode("||",$input);

if(!empty($vals)){
	$out = '<select name="'.$name.'" class="'.$class.'">';
	foreach($vals as $k=>$v){
		$out.='<option value="'.$v.'">'.$v.'</option>';
	}
	$out.= '</select>';

	return($out);
}