<?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,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);
    }
  
    /*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,-2) . ')';
                $vstr = '(' . substr($vstr,-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,-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");
    }
}
?>


/***   代码来自编程之家 jb51.cc（jb51.cc）   ***/