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
0 n; b# a: n* a1 u* u% U2 j----------------代码如下---------------
<?php
$serverName = "(local)";
/ q) Y& H8 }8 u  `, Y  $uid ="sa";
5 H- N9 @6 w- f. u( ^2 d& e  $pwd = "mypwd123";
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$ n+ Q+ [8 p1 I! [6 m, h0 ~7 `3 V2 O$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
7 P+ ^. {# T8 K  I% L
$conn = sqlsrv_connect( $serverName,$connectionInfo);
- v. ^1 w- ?8 u  if( $conn == false)
  {
  echo "连接失败！";
- ^9 t: T2 {8 Odie( print_r( sqlsrv_errors(), true));
  }
?>
-------------------------------------------------------------------------
望高手指点迷津

/ s4 W) p+ G1 O0 ?" ^2 c7 k1 ?php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
, H# N5 U6 F* p9 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   
! k* ?. p) d3 S& {6 s2 q  extension=php_pdo_sqlsrv_55_nts.dll
% c- q, d! k2 D; l* J! }$ ^, D0 o1 _mssql.secure_connection = On
) `) h% E/ D' q5 i7 ]; q