PHP封装的MSSql操作类完整实例

本文实例讲述了PHP封装的MSSql操作类。分享给大家供大家参考，具体如下：

<?php
/*MSSql的操作类*/
class MSSql {
  var $link;
  var $querynum = 0;
  /*连接MSSql数据库，参数：dbsn->数据库服务器地址，dbun->登陆用户名，dbpw->登陆密码，dbname->数据库名字*/
  function Connect($dbsn, $dbun, $dbpw, $dbname) {
    if($this->link = @mssql_connect($dbsn, $dbun, $dbpw, true)) {
      $query = $this->Query("SET TEXTSIZE 2147483647");
      if (@mssql_select_db($dbname, $this->link)) {
      } else {
        $this->halt("Can not Select DataBase");
      }
    } else {
      $this->halt("Can not connect to MSSQL server");
    }
  }
  /*执行sql语句，返回对应的结果标识*/
  function Query($sql) {
    if($query = @mssql_query($sql, $this->link)) {
      $this->querynum++;
      return $query;
    } else {
      $this->querynum++;
      $this->halt("MSSQL Query Error", $sql);
    }
  }
  /*执行Insert Into语句，并返回最后的insert操作所产生的自动增长的id*/
  function Insert($table, $iarr) {
    $value = $this->InsertSql($iarr);
    $query = $this->Query("INSERT INTO " . $table . " " . $value . "; SELECT SCOPE_IDENTITY() AS [insertid];");
    $record = $this->GetRow($query);
    $this->Clear($query);
    return $record["insertid"];
  }
  /*执行Update语句，并返回最后的update操作所影响的行数*/
  function Update($table, $uarr, $condition = "") {
    $value = $this->UpdateSql($uarr);
    if ($condition) {
      $condition = " WHERE " . $condition;
    }
    $query = $this->Query("UPDATE " . $table . " SET " . $value . $condition . "; SELECT @@ROWCOUNT AS [rowcount];");
    $record = $this->GetRow($query);
    $this->Clear($query);
    return $record["rowcount"];
  }
  /*执行Delete语句，并返回最后的Delete操作所影响的行数*/
  function Delete($table, $condition = "") {
    if ($condition) {
      $condition = " WHERE " . $condition;
    }
    $query = $this->Query("DELETE " . $table . $condition . "; SELECT @@ROWCOUNT AS [rowcount];");
    $record = $this->GetRow($query);
    $this->Clear($query);
    return $record["rowcount"];
  }
  /*将字符转为可以安全保存的mssql值，比如a"a转为a""a*/
  function EnCode($str) {
    return str_replace(""", """", str_replace("", "", $str));
  }
  /*将可以安全保存的mssql值转为正常的值，比如a""a转为a"a*/
  function DeCode($str) {
    return str_replace("""", """, $str);
  }
  /*将对应的列和值生成对应的insert语句，如：array("id" => 1, "name" => "name")返回([id], [name]) VALUES (1, "name")*/
  function InsertSql($iarr) {
    if (is_array($iarr)) {
      $fstr = "";
      $vstr = "";
      foreach ($iarr as $key => $val) {
        $fstr .= "[" . $key . "], ";
        $vstr .= """ . $val . "", ";
      }
      if ($fstr) {
        $fstr = "(" . substr($fstr, 0, -2) . ")";
        $vstr = "(" . substr($vstr, 0, -2) . ")";
        return $fstr . " VALUES " . $vstr;
      } else {
        return "";
      }
    } else {
      return "";
    }
  }
  /*将对应的列和值生成对应的insert语句，如：array("id" => 1, "name" => "name")返回[id] = 1, [name] = "name"*/
  function UpdateSql($uarr) {
    if (is_array($uarr)) {
      $ustr = "";
      foreach ($uarr as $key => $val) {
        $ustr .= "[" . $key . "] = "" . $val . "", ";
      }
      if ($ustr) {
        return substr($ustr, 0, -2);
      } else {
        return "";
      }
    } else {
      return "";
    }
  }
  /*返回对应的查询标识的结果的一行*/
  function GetRow($query, $result_type = MSSQL_ASSOC) {
    return mssql_fetch_array($query, $result_type);
  }
  /*清空查询结果所占用的内存资源*/
  function Clear($query) {
    return mssql_free_result($query);
  }
  /*关闭数据库*/
  function Close() {
    return mssql_close($this->link);
  }
  function halt($message = "", $sql = "") {
    $message .= "<br />MSSql Error:" . mssql_get_last_message();
    if ($sql) {
      $sql = "<br />sql:" . $sql;
    }
    exit("DataBase Error.<br />Message $message $sql");
  }
}
?>

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