limit #_EVENTEXCERPT

function my_em_mod_excerpt_placeholders($replace, $EM_Event, $result){
	if ( $result == '#_EVENTEXCERPT' ) {
		$replace = preg_replace('/<img[^>]+./','', $replace);
		if ( str_word_count($replace) > 25 ) {
			$length = 25;
			$replace = implode(' ',array_slice(explode(' ', $replace),0,$length));
			$replace = $replace . '... ';
		}
	}
	return $replace;
}
add_filter('em_event_output_placeholder','my_em_mod_excerpt_placeholders',1,3);