Elgg是一款免费开源的社交网络系统(php/mysql)，以BLOG为中心实现社会网络化，一经问世，即好评如潮，更有人将其与大名鼎鼎的moodle相提并论。这个平台不仅获得了2007年最佳社会性网络开源CMS平台的荣誉，更得到了info world的最高评价。 

Elgg v1.7.15 changelog:
 Bug fixes:
  * Fixed warnings thrown in search_get_highlighted_relevant_substrings()
    about mb_strpos().
  * elgg_get_entities() properly supports multiple selects.
  * Fixed incorrect handling of viewtypes in js, css, and simplecache.
  * Correctly translating "Embed / upload media" in Embed plugin.
  * elgg_list_registered_entities() no longer returns all entities if none
    are registered.
  * Fixed possible DB exception in user validation by email plugin.
  * Fixed OpenDD import.