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)
PHP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：
5 G: n% U% D4 h+ o* ~+ r  k/ C1 Q+ C1 BPHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
4 Z  \/ B  Q, K) ]$ v) Y# C1 n----------------代码如下---------------
+ Z4 Q: k$ l+ g0 x6 f<?php
2 E: ~7 o0 ~) ]5 y4 [7 g0 F$serverName = "(local)";
  $uid ="sa";
  $pwd = "mypwd123";
7 \/ A" t0 G9 W5 p# {
$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
  `4 B" z; H. f) K8 L5 a/ @
$conn = sqlsrv_connect( $serverName,$connectionInfo);
; p" Y$ K0 {+ l9 s7 l5 v  if( $conn == false)
  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
1 s% @: ]. e. P  }
- }2 e* g. O2 P7 {7 `?>
3 l* N! g* \  \& R+ }+ X-------------------------------------------------------------------------
望高手指点迷津

2 y% _) }$ M7 w1 Bphp.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
+ J/ y/ j0 o& h' g% Kmssql.secure_connection = On
2 C+ [" _1 O' K3 G% F- x
8 N( {: Q8 }7 ^( c) O; \. d