Conditional placeholder locations

function website_location_output_condition($replacement, $condition, $match, $EM_Location){
    if( is_object($EM_Location) && preg_match('/^has_website$/',$condition, $matches) ){
        if( !in_array($args['website'],$EM_Location->event_attributes) && !empty($EM_Location->event_attributes['website']) ){
            $replacement = preg_replace("/\{\/?$condition\}/", '', $match);
        }else{
            $replacement = '';
        }
    }
    return $replacement;
}
add_action('em_location_output_condition', 'website_location_output_condition', 1, 4)