php教程 mssql 数据库教程连接类代码
class db_sql {
  var $host     = ;
  var $database = ;
  var $user     = ;
  var $password = ;
  var $link_id  = 0;
  var $query_id = 0;
  var $record   = array();
  var $row      = 0;
var $errno    = 0;
  var $error    = ;
  var $auto_free = 0;     ## set this to 1 to automatically free results
/* public: constructorwww.bkjia.c0m */
  function db_sql($query = ) {
      $this->query($query);
  }
  function connect() {
    if ( 0 == $this->link_id ) {
      $this->link_id=mssql_connect($this->host, $this->user, $this->password);
      if (!$this->link_id)
        $this->halt(link-id == false, mssql_pconnect failed);
      else
          @mssql_select_db($this->database, $this->link_id);
    }
  }
  function free_result(){
      mssql_free_result($this->query_id);
      $this->query_id = 0;
  }
function query($query_string)
  {
/* no empty queries, please, since php4 chokes on them. */
    if ($query_string == )
      /* the empty query string is passed on from the constructor,
       * when calling the class without a query, e.g. in situations
       * like these: '$db = new db_sql_subclass;'
       */
      return 0;
      if (!$this->link_id)
        $this->connect();
#   printf(
debug: query = %s
n, $query_string);
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