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)
. j, H9 y) w$ R: J# e1 j1 C" OPHP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：
* ]9 B" x4 `0 P3 t9 i8 F8 g/ |3 TPHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
----------------代码如下---------------
4 W/ }) M4 M3 |. H! G* L* h8 L<?php
: b* A1 Q4 h, }/ L/ C$serverName = "(local)";
3 i: a7 v2 D9 ]; p' U3 K% I# D  $uid ="sa";
- i; X5 @/ A  A( y  $pwd = "mypwd123";
* K; u& t" v8 F+ ~4 k+ W0 g
) d2 ~) I1 M; a& v  j$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
4 W* H, d3 S- X4 \; X, j/ h
$conn = sqlsrv_connect( $serverName,$connectionInfo);
  if( $conn == false)
4 n' C  E4 q+ Y' _* ~1 [  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
0 t6 O, J3 h9 C, R, M/ ^9 ]& H1 z  }
  u" {% i+ ?1 d. L' [?>
-------------------------------------------------------------------------
' O! q4 f: `  X望高手指点迷津

php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
$ V1 e1 C8 o8 `. A2 C8 c" `; L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
# O  K" }6 Y( G. ^5 j8 y7 a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
& ]6 V+ g! _5 q7 ~: i1 s7 Tmssql.secure_connection = On
* V2 o" R( D* S$ o