php开发大型程序应该注意的问题 (3)

   $dbh = mysql_connect ("localhost", "sh", "pass") or die (sprintf ("Cannot connect to MySQL [%s]: %s",
  mysql_errno (), mysql_error ()));
  @mysql_select_db ("MainSite")
  or die (sprintf ("Cannot select database [%s]: %s",
  mysql_errno (), mysql_error ()));

   $sth = @mysql_query ("SELECT * FROM site",  $dbh)
  or die (sprintf ("Cannot execute query [%s]: %s",
  mysql_errno (), mysql_error ()));

   $site_info = mysql_fetch_object ( $sth);

  function print_header ()
  {
  　global  $site_info;
  　print  $site_info->header; 字串4
  }

  function print_body ()
  {
  　global  $site_info;
  　print nl2br ( $site_info->body);
  }

  function print_links ()
  {
  　global  $site_info;

  　 $links = explode ("\n",  $site_info->links);
  　 $names = explode ("\n",  $site_info->link_names);

  for ( $i = 0;  $i < count ( $links);  $i++)
  {
  　print "\t\t\t
  　<a href=\" $links[ $i]\"> $names[ $i]</a>
  　\n<br>\n";
  }
  }
  ?>