无法使用sqlsrv_connect连接MSSQL Server数据库

问题描述

这是一个常见主题，在此之前已经被问了好几次了。我已经经历了其中一些，但无法使其正常工作。

我正在尝试使用以下代码从MSsql Server连接一个PHP数据库。

$serverName = "cl-t139-086cn\\MSsqlSERVER"; //serverName\instanceName

$connectionInfo = array( "Database"=>"AutoTrader","UID"=>"user_id","PWD"=>"password");
$conn = sqlsrv_connect( $serverName,$connectionInfo);

if( $conn ) {
     echo "Connection established.<br />";
}else{
     echo "Connection Could not be established.<br />";
     die( print_r( sqlsrv_errors(),true));
}

我尝试了以下两种变体，但没有任何作用

$serverName = (local)\MSsqlSERVER
$serverName = localhost\MSsqlSERVER

实例名称为MSsqlSERVER，我通过运行services.mfc在Windows服务中签入。

数据库用户名和密码也是正确的，因为在同一服务器上运行但使用.NET构建的另一个运行Web.config文件中使用了相同的凭据。

扩展名sqlsrv已安装并启用，可以通过运行phoinfo()进行检查。

这是页面上显示的完整错误：

Connection Could not be established. Array ( [0] => Array ( [0] => 08001 [sqlSTATE] => 08001 [1] => 87 [code] => 87 [2] => [Microsoft][ODBC Driver 17 for sql Server]sql Server Network Interfaces: Connection string is not valid [87]. [message] => [Microsoft][ODBC Driver 17 for sql Server]sql Server Network Interfaces: Connection string is not valid [87]. ) [1] => Array ( [0]
=> HYT00 [sqlSTATE] => HYT00 [1] => 0 [code] => 0 [2] => [Microsoft][ODBC Driver 17 for sql Server]Login timeout expired [message] => [Microsoft][ODBC Driver 17 for sql Server]Login timeout expired ) [2] => Array ( [0] => 08001 [sqlSTATE] => 08001 [1] => 87 [code] => 87 [2] => [Microsoft][ODBC Driver 17 for sql Server]A network-related or instance-specific error has occurred while establishing a connection to sql Server. Server is not found or not accessible. Check if instance name is correct and if sql Server is configured to allow remote connections. For more information see sql Server Books Online. [message] => [Microsoft][ODBC Driver 17 for sql Server]A network-related or instance-specific error has occurred while establishing a connection to sql Server. Server is not found or not accessible. Check if instance name is correct and if sql Server is configured to allow remote connections. For more information see sql Server Books Online. ) )

环境：

• 操作系统：Windows Server 2016（Windows 10）
• PHP：XAMPP
• PHP版本：7.4.x
• 数据库：MSsql Server
• 实例名称：MSsqlSERVER

我做错了什么？

解决方法

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