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)
2 v  O0 M+ h4 }1 p1 APHP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---------------
3 s% C' N1 b$ Y4 `<?php
$serverName = "(local)";
  $uid ="sa";
2 G0 f6 D' X5 E2 O7 E, S; `) c  $pwd = "mypwd123";
& ?# {0 L0 u+ {2 ^* u- W8 W, I! D
$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");

& p  l! w8 }" M2 k6 ^3 o& E: Y$conn = sqlsrv_connect( $serverName,$connectionInfo);
  if( $conn == false)
3 V+ _9 _) W; _0 n) E5 ~  {
* w& R. T& w9 |+ C! ^, D2 d  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
0 f0 T3 }& I" @?>
1 H* F; R, C; ~4 V-------------------------------------------------------------------------
望高手指点迷津
4 {: [+ Q* p6 \* Y& j+ R' @
0 R) ~% v( D/ _) R- nphp.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
. n+ |$ q4 c- D1 L: R; \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
% L. i+ r% r. n( x5 I并且修改了php.ini的配置文件extension=php_sqlsrv_55_nts.dll   
1 B6 u0 J/ O: z2 @  y8 Q, r8 A7 M  extension=php_pdo_sqlsrv_55_nts.dll
$ [1 t, X, R+ t; h, m+ `mssql.secure_connection = On
+ M) U0 m3 \; j+ H6 o8 }