php mssql 数据库连接类代码(1/2)

  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.111cn.net */
  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("<br>Debug: query = %s<br> ", $Query_String);