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)
' _, C% P5 `0 r7 T+ lPHP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：
- l- L! L; r" @! s( ^3 wPHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
----------------代码如下---------------
6 @. E  L! J  }- x<?php
8 D8 m% \2 d) A% r; J$serverName = "(local)";
  $uid ="sa";
  $pwd = "mypwd123";

$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
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6 B3 J  b8 ]5 z# l: U4 U$conn = sqlsrv_connect( $serverName,$connectionInfo);
4 p6 i6 C6 M; l# b1 E  if( $conn == false)
  {
5 o: g4 n# Y2 k$ I# N7 J  U  echo "连接失败！";
. e  q8 s% F5 X% ~+ h/ C4 [* Ydie( print_r( sqlsrv_errors(), true));
. G8 v5 v4 q& @& g7 {6 D# N  }
; J4 ^- I* `6 b$ C' h( a/ R?>
-------------------------------------------------------------------------
望高手指点迷津

2 i' ?1 ?- Z, f( t1 B+ Cphp.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
/ k+ K$ k4 H1 T$ J- n8 d. ^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
9 |' H1 g& g' O3 b+ i6 G0 f
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