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 u# v  p  }3 D* ?, `" E8 YPHP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：
; k+ y( v  N% n1 J/ i& [7 V) XPHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
- A/ t! E8 i: Y: w; _5 Q----------------代码如下---------------
<?php
  k& ]$ S* l' b$serverName = "(local)";
& t5 h( W, J* V4 R2 y, o8 [  $uid ="sa";
  $pwd = "mypwd123";
* ^4 Z& N# K6 g5 x( g, k5 v4 S
1 X2 {6 f: |  y7 q: N7 m! _& H$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
7 V5 L. l, C  X: R% }: Z
$conn = sqlsrv_connect( $serverName,$connectionInfo);
* `$ h* n- |; Z; z  if( $conn == false)
2 Y! @/ C+ M2 p, f$ Y1 @9 c9 f/ V  v0 h  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
' ^! z6 t# |( ?, B" M% P' }?>
3 @* ^* Q% f9 y1 ^-------------------------------------------------------------------------
* Z# E/ ~- O) u/ N  `8 ]) y: e( N/ Q望高手指点迷津
" y- R: p: S: S  m8 I+ I7 k
3 ?6 O8 z* A. ^) I9 Bphp.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
9 R0 n* J  l9 R' k. q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
9 E% g3 E5 R" R  k- `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! `( B! w9 _8 Imssql.secure_connection = On