(PHP 4, PHP 5 < 5.3.0)
msql_list_dbs — List mSQL databases on server
$link_identifier
  ] ) : resource
   msql_list_tables() lists the databases available on the
   specified link_identifier. 
  
link_identifiermSQL 连接。如果不指定,则使用由 msql_connect() 最近打开的连接。如果没有找到该连接,函数会尝试通过调用 msql_connect() 建立连接并使用它。
   Returns a result set which may be traversed with any function that fetches
   result sets, such as msql_fetch_array(). On failure, 
   this function will return FALSE.