problem with Ditto 2.1.0 on Revolution 2.0.0 alpha 6

$phx = new prePHx($template);
$phx->setPlaceholders($placeholders);
$output = $phx->output();

<?php
	function render($resource, $template, $removeChunk,$dateSource,$dateFormat,$ph=array(),$phx=0,$x=0) {
    	if (!is_array($resource)) {
			return $this->modx->lexicon('resource_array_error');
		}
		$placeholders = array();
		$contentVars = array();
		foreach ($resource as $name=>$value) {
			$placeholders["$name"] = $value;
			//$contentVars["[[*$name]]"] = $value;
		}

		/* set author placeholder */
		if (in_array("author",$this->fields["display"]["custom"])) {
			$placeholders['author'] = $this->getAuthor($resource['createdby']);
		}

		/* set title placeholder */
		if (in_array("title",$this->fields["display"]["custom"])) {
			$placeholders['title'] = $resource['pagetitle'];
		}

		/* set sequence placeholder */
		if (in_array("ditto_iteration",$this->fields["display"]["custom"])) {
			$placeholders['ditto_iteration'] = $x;
		}

		/* set url placeholder */
		if (in_array("url",$this->fields["display"]["custom"])) {
			$placeholders['url'] = $this->modx->makeUrl($resource['id'],'','','full');
		}

		if (in_array("date",$this->fields["display"]["custom"])) {
			$timestamp = ($resource[$dateSource] != "0") ? $resource[$dateSource] : $resource["createdon"];
			$placeholders['date'] = strftime($dateFormat,$timestamp);
		}

		if (in_array("content",$this->fields["display"]["db"]) && $this->format != "html") {
			$resource['content'] = $this->relToAbs($resource['content'], $this->modx->config['site_url']);
		}

		if (in_array("introtext",$this->fields["display"]["db"]) && $this->format != "html") {
			$resource['introtext'] = $this->relToAbs($resource['introtext'], $this->modx->config['site_url']);
		}

		$customPlaceholders = $ph;
		/* set custom placeholder */
		foreach ($ph as $name=>$value) {
			if ($name != "*") {
				$placeholders[$name] = call_user_func($value[1],$resource, $this);
				unset($customPlaceholders[$name]);
			}
		}

		foreach ($customPlaceholders as $name=>$value) {
			$placeholders = call_user_func($value,$placeholders);
		}

		if (count($this->fields["display"]['qe']) > 0) {
			$placeholders = $this->renderQELinks($this->template->fields['qe'],$resource,$this->modx->lexicon('edit').' : '.$resource['pagetitle'].' : ',$placeholders);
				/* set QE Placeholders */
		}

        //print_r($placeholders);
        /*
		if ($phx == 1) {
			$PHs = $placeholders;
			foreach($PHs as $key=>$output) {
				$placeholders[$key] = str_replace( array_keys( $contentVars ), array_values( $contentVars ), $output );
			}
			unset($PHs);
			$phx = new prePHx($template);
			$phx->setPlaceholders($placeholders);
			$output = $phx->output();
		} else {
		 	$output = $this->template->replace($placeholders,$template);
			$output = $this->template->replace($contentVars,$output);
		}
		*/

		 	$output = $this->template->replace($placeholders,$template);
			//$output = $this->template->replace($contentVars,$output);		
		
        //I think here is something Todo:
		if ($removeChunk) {
			foreach ($removeChunk as $chunk) {
				$output = str_replace('[[$'.$chunk.']]',"",$output);
				$output = str_replace($this->modx->getChunk($chunk),"",$output);
					/* remove chunk that is not wanted */
			}
		}
		return $output;
	}
?>

<?php
    function replace( $placeholders, $tpl ) {
/*
		$keys = array();
		$values = array();
		foreach ($placeholders as $key=>$value) {
			$keys[] = '[[+'.$key.']]';
			$values[] = $value;
		}
		return str_replace($keys,$values,$tpl);
*/
        $chunk = $this->modx->newObject('modChunk');
        $chunk->setCacheable(false);
        $output = $chunk->process($placeholders, $tpl);
        return $output;
 
	}

	function fetch($tpl){

		$template = "";
		//if ($this->modx->getChunk($tpl) != "") {
		//	$template = $this->modx->getChunk($tpl);
		if ($chunk= $this->modx->getObject('modChunk', array ('name' => $tpl), true)) {
			$template = $chunk->getContent();			
		} else if(substr($tpl, 0, 6) == "@FILE:") {
			$template = $this->get_file_contents(substr($tpl, 6));
		} else if(substr($tpl, 0, 6) == "@CODE:") {
			$template = substr($tpl, 6);
		} else if(substr($tpl, 0, 5) == "@FILE") {
			$template = $this->get_file_contents(trim(substr($tpl, 5)));
		} else if(substr($tpl, 0, 5) == "@CODE") {
			$template = trim(substr($tpl, 5));
		} else {
			$template = $this->modx->lexicon('missing_placeholders_tpl');
		}
		return $template;
	}
?<