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)
) R$ ~$ R( b$ g  _, A0 _& }$ IPHP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";
$ O- K3 @) [- f  $pwd = "mypwd123";
" e! Q. u/ L- \5 t+ S
7 `& u- b( p2 o$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");

5 m9 f5 \/ l2 \" L$conn = sqlsrv_connect( $serverName,$connectionInfo);
) [2 w" C$ x7 W! n* M" m' p  if( $conn == false)
* _4 |" ]' W4 a; J6 a- @+ B  {
  \" s: C) {1 ]  n; [6 X: e6 ^/ r  echo "连接失败！";
3 @  {% V4 ?/ @$ y' `9 F3 k9 Idie( print_r( sqlsrv_errors(), true));
9 l; N* y* g" M9 |  h  }
?>
-------------------------------------------------------------------------
* Y1 K7 G1 N8 l: z: f望高手指点迷津
  _5 }9 R, H2 B% p1 {, m, s
php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
/ S/ Z+ Y, K. B& o* r$ u* J& ]: Z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
6 R' L) T( l: W$ e. b2 D/ s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