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
----------------代码如下---------------
<?php
$serverName = "(local)";
  $uid ="sa";
  $pwd = "mypwd123";
% U- y$ U  b  n4 S# `5 u& |
3 r- q3 U0 _- P0 w% J. D$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");

+ L# O! {; U5 t, ]. n* U$conn = sqlsrv_connect( $serverName,$connectionInfo);
- z  C8 ]" N; F! Z& V  if( $conn == false)
  {
$ W1 f' C3 \# v0 g9 _  echo "连接失败！";
$ t0 v0 C3 e; O) [die( print_r( sqlsrv_errors(), true));
  }
* k1 e8 I6 X* u: R4 r0 L( ~?>
-------------------------------------------------------------------------
) V. H  X$ d2 F6 `- [% Z望高手指点迷津
8 ^# G6 s- F: Z
php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
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 a% A0 d. C: W; D- F0 N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

1 x  q/ E3 F6 ]4 F& n" L: ?