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：
PHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
$ I/ L) R2 W& H7 u' C6 O----------------代码如下---------------
5 V$ [( |, n( B- j- Z<?php
$serverName = "(local)";
5 M/ {# i8 M( M% ^  $uid ="sa";
/ j% s* L9 _6 x- |  $pwd = "mypwd123";

' l( i3 }' L' ^% ?5 v- }$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
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$conn = sqlsrv_connect( $serverName,$connectionInfo);
3 C4 X+ G# i2 j: y7 M( o7 Q  if( $conn == false)
  {
9 O# {+ l1 ~6 E( D+ ?  echo "连接失败！";
! G* m9 V" M! a. b( y4 tdie( print_r( sqlsrv_errors(), true));
  }
1 {( {* V4 j6 n3 f, `" A* @?>
-------------------------------------------------------------------------
7 y0 T  V2 n: n; Y4 j- m  A望高手指点迷津

0 @+ s8 P; K) d) z- X7 k0 c2 @php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
8 @+ n- {5 k' n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
mssql.secure_connection = On
! G+ u) \$ m  ^3 ?
% v- O* U  m1 y3 G& @  G; r& O