CoachBirgit · August 29, 2015 14:13
diff --git a/functions.php b/functions.php
 /* make post-thumbnails responsive by default */
 add_filter('post_thumbnail_html','tm_add_class_to_thumbnail');
 function tm_add_class_to_thumbnail($thumb) {
 	$thumb = str_replace('attachment-', 'img-responsive attachment-', $thumb);
 	return $thumb;
 }
	/* make post-thumbnails responsive by default */
	add_filter('post_thumbnail_html','tm_add_class_to_thumbnail');
	function tm_add_class_to_thumbnail($thumb) {
	$thumb = str_replace('attachment-', 'img-responsive attachment-', $thumb);
	return $thumb;
	}