Custom Field Correct Php Formatting

Hi wonder if anyone knows the answer to this;

I have a theme which I’m editing that doesn’t have custom fields enabled; I’ve installed the types custom field plugin;

Basically I’m not sure if I’m formatting the php correctly as when I do the tetx isn’t displayed within the div tag as expect it just displays outside of it and unformatted, I would have expected the CSS to style it; however if i replace the echo function with just some html text it displasy fine;

Can anyone suggest whther its possible?

heres’ the code in question;

if ( sizeof( $exclude_info )!=2 ) {
			//display the item info
			$html.='<div class="pg-info">';
			$html.='<div class="pg-details'.$add_class.'">';
			if ( !in_array( 'title', $exclude_info ) ) {
				$html.='<h2>'.$post->post_title.'';
				$html.='<br>';
				$html.='<div class="projectinfo">';
				$projectinfo = types_render_field('project-info', array('output'=>"html"));
 				echo($projectinfo);
				$html.='</div>';
				$html.='</div>';
				$html.='</h2>';
			}
			$html.='</div>';
		}

		$html.='</a></div>';
		$html.='</div>';

		return $html;
	}
}

Thanks
Darren