求教连接数据库问题，win8.1(X64)+IIS+php5.5.23+sqlserver2008R2

曾经的王者

本人新手刚学习PHP，遇到连接SQLSERVER2008R2数据库问题，环境win8.1(X64)+IIS8.5+php5.5.23+sqlserver2008R2(x64)
* ^) ?( z5 M* x7 nPHP文件能成功执行，但是执行phpinfo()并未发现sqlsrv，执行数据库连接后提示如下：
PHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
----------------代码如下---------------
<?php
$serverName = "(local)";
$ a  J: p4 C# G5 V9 k  $uid ="sa";
& D  E! K8 x  {) Y- C" q  $pwd = "mypwd123";

$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
4 x: j& n% e" r6 N- \
$conn = sqlsrv_connect( $serverName,$connectionInfo);
/ N% D- x6 V" J# l4 ]- D  if( $conn == false)
6 u. z0 y8 w, N# M) W0 c! ~( v  {
9 y- Y" T1 P- w8 d0 x: A# W$ _  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
& D( z- w5 b. e! }; a?>
, V3 G2 J: t, \-------------------------------------------------------------------------
望高手指点迷津

7 D; q9 {+ [: e9 z( rphp.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
微软官网下载 解压SQLSRV32.EXE后，拷贝php_pdo_sqlsrv_55_nts.dll和php_sqlsrv_55_nts.dll 到PHP安装目录ext
并且修改了php.ini的配置文件extension=php_sqlsrv_55_nts.dll   
  extension=php_pdo_sqlsrv_55_nts.dll
" U1 I7 E3 w2 w: D+ K5 [# Zmssql.secure_connection = On
3 w& }# a; b2 m* Q