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：
& U" ]' ]1 _  B* L- @7 O( I0 FPHP 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";
, }4 Z/ Q' |+ p* L% `' B& \8 U, |  $pwd = "mypwd123";
2 s; K% Q; {" v! s
$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");

$ E: E: U$ X3 C; a$conn = sqlsrv_connect( $serverName,$connectionInfo);
6 q, D9 C; N% e" h6 Z  |  if( $conn == false)
  {
  echo "连接失败！";
: c' ~7 q! m! R" S+ N4 h) _" rdie( print_r( sqlsrv_errors(), true));
  }
5 c) U9 f( R# O?>
-------------------------------------------------------------------------
望高手指点迷津

4 ^8 P4 v3 @- X  i6 Uphp.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
6 r( S0 }. c8 T7 a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   
' x% [1 t+ `& S' \% ^/ D  extension=php_pdo_sqlsrv_55_nts.dll
3 ?$ |5 }  ~3 r# c% Lmssql.secure_connection = On

# @/ t; }5 C4 {7 o; ^