sqlsrv_connect：未找到数据源名称，未指定默认驱动程序

Question

我在连接PHP和在远程计算机上运行的SQL SERVER 2008时遇到了困难。我有php版本5.4。3和Apache2.2。22.我的计算机上已经运行了SQL SERVER 2008。我的wamp\bin\php\php5中包含以下文件。4.3\ext文件夹：

• php_sqlsrv_54_ts.dll
• php_pdo_sqlsrv_54_ts.dll

运行简单的代码，比如

$conn = sqlsrv_connect( $serverName, $connectionInfo);

if( $conn )
{
 echo "Connection established.\n";
}
else
{
 echo "Connection could not be established.\n";
 die( print_r( sqlsrv_errors(), true));
}

我遇到以下错误：

Connection could not be established. Array (
    [0] => Array (
        [0] => IMSSP [SQLSTATE] => IMSSP
        [1] => -49 [code] => -49
        [2] => This extension requires the Microsoft SQL Server 2012 Native Client. Access the following URL to download the Microsoft SQL Server 2012 Native Client ODBC driver for x86: http://go.microsoft.com/fwlink/?LinkId=163712 [message] => This extension requires the Microsoft SQL Server 2012 Native Client. Access the following URL to download the Microsoft SQL Server 2012 Native Client ODBC driver for x86: http://go.microsoft.com/fwlink/?LinkId=163712
    )
    [1] => Array (
        [0] => IM002 [SQLSTATE] => IM002 
        [1] => 0 [code] => 0
        [2] => [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified [message] => [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
    )
) 

但是我不知道为什么我被要求安装MicrosoftSQLServer 2012 Native Client。

phpi尝试过这个链接，但没有成功。

提前感谢。

更新1：

我下载了PHP 5.3.1，并遵循了这个教程和脚本的魅力。

Answer 1

安装ODBC驱动程序（https://www.microsoft.com/en-us/download/details.aspx?id=36434）。现在我可以访问远程MSSQL服务器，而无需在我的计算机中安装MSSQL服务器

Answer 2

根据要求：SQLSRV扩展要求在运行PHP的同一台计算机上安装Microsoft SQL Server 2012本机客户端。