让wampserver2.5.exe支持sql server数据库的方法

<?php $serverName = "."; 
$connectionInfo = array( "Database"=>"yunjianyan", "UID"=>"sa", "PWD"=>"123"); 
$conn = sqlsrv_connect( $serverName, $connectionInfo ); 
if( $conn === false ) 
{ 
die( print_r( sqlsrv_errors(), true)); 
} 
$sql = "SELECT * FROM users"; 
$stmt = sqlsrv_query( $conn, $sql ); 
if( $stmt === false) 
{ 
die( print_r( sqlsrv_errors(), true) ); 
}
 while($row = sqlsrv_fetch_array($stmt)) 
{
     echo $row[0]."-----".$row[1]."-----".$row[2]."-----".$row[3]."<br/>"; 
     }