custom category has_parent conditional

<?php
// sample usage: {has_category_parent} content {/has_category_parent}
add_action('em_event_output_condition', 'my_em_custom_category_has_parent', 100, 4);
function my_em_custom_category_has_parent($replacement, $condition, $match, $EM_Event){
	if ( preg_match('/^has_category_parent$/',$condition, $matches) ){
		$count_cats = count($EM_Event->get_categories()->categories) > 0;
		if( $count_cats <= 1 ){
			foreach($EM_Event->get_categories() as $EM_Category){
				if( $EM_Category->parent > 0){
					$replacement = preg_replace("/\{\/?$condition\}/", '', $match);
				}else{
					$replacement = '';
				}
			}
		}else{
			$replacement = '';
		}
	}
	return $replacement;
}