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标题: php的mssql数据库连接类实例 [打印本页]

作者: 阿情 时间: 2018-2-14 05:52

         本文实例讲述了php的mssql数据库连接类实例代码,分享给大家供大家参考。
具体实现代码如下:
[U]复制代码[/U] 代码如下: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

  function DB_Sql($query = "") {
   $this->query($query);
  }
  function connect() {
if ( 0 == $this->Link_ID ) {
   $this->Link_ID=mssql_connect($this->Host, $this->User, $this->

assword);
   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
", $Query_String);

$this->Query_ID = mssql_query($Query_String, $this->Link_ID);
$this->Row = 0;
if (!$this->Query_ID) {
   $this->Errno = 1;
   $this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
   $this->halt("Invalid SQL: ".$Query_String);
}
return $this->Query_ID;
  }

  function next_record() {

if ($this->Record = mssql_fetch_row($this->Query_ID)) {
   // add to Record[]
   $count = mssql_num_fields($this->Query_ID);
   for ($i=0; $iQuery_ID,$i);
      $this->Record[strtolower($fieldinfo->name)] = $this->Record[$i];
   }
   $this->Row += 1;
   $stat = 1;
} else {
   if ($this->Auto_Free) {
         $this->free_result();
      }
   $stat = 0;
}
return $stat;
  }

  function seek($pos) {
      mssql_data_seek($this->Query_ID,$pos);
   $this->Row = $pos;
  }
  function metadata($table) {
$count = 0;
$id = 0;
$res = array();
$this->connect();
$id = mssql_query("select * from $table", $this->Link_ID);
if (!$id) {
   $this->Errno = 1;
   $this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
   $this->halt("Metadata query failed.");
}
$count = mssql_num_fields($id);

for ($i=0; $ifree_result();
return $res;
  }

  function affected_rows() {
// Not a supported function in PHP3/4.  Chris Johnson, 16May2001.
// return mssql_affected_rows($this->Query_ID);
$rsRows = mssql_query("Select @@rowcount as rows", $this->Link_ID);
if ($rsRows) {
   return mssql_result($rsRows, 0, "rows");
}
  }

  function num_rows() {
return mssql_num_rows($this->Query_ID);
  }

  function num_fields() {
return mssql_num_fields($this->Query_ID);
  }
  function nf() {
return $this->num_rows();
  }

  function np() {
print $this->num_rows();
  }

  function f($Field_Name) {
return $this->Record[strtolower($Field_Name)];
  }

  function p($Field_Name) {
print $this->f($Field_Name);
  }

  function halt($msg) {
printf("[/td][/tr][/table]Database error: %s
", $msg);
printf("MSSQL Error: %s (%s)
",
   $this->Errno,
   $this->Error);
die("Session halted.");
  }
}
希望本文所述对大家的PHP程序设计有所帮助。


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