如何将wamp主机连接到远程sql server

Question

我已经在php C中上传了以下文件：\ wamp \ bin \ php \ php5.5.12 \ ext

1. php_pdo_sqlsrv_55_nts.dll
2. php_pdo_sqlsrv_55_ts.dll
3. php_sqlsrv_55_ts.dll

我还在php.ini中启用了以下内容

1. extension_dir =＆＃34; c：/wamp/bin/php/php5.5.12/ext /"
2. [PHP_SQLSRV] 延长= php_pdo_sqlsrv_55_ts.dll 延长= php_sqlsrv_55_ts.dll

但我仍然得到错误：

  

致命错误：调用未定义的函数sqlsrv_connect（）

这是我的连接文件中的代码：

$serverName = "xxx.xxx.xxx.x"; //serverName\instanceName
$connectionInfo = array( "Database"=>"xxxxx", "UID"=>"xxx", "PWD"=>"xxx");
$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));
}