PHP的MSSql的操作类

/*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");   
	}   
}

• PHP
• sql
• 技术人生
• 数据库语言