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
5 y- G! G* H4 ]7 B$ K$ K$ ?----------------代码如下---------------
<?php
$serverName = "(local)";
  $uid ="sa";
6 r& J, L' W7 \  $pwd = "mypwd123";
  c; L+ i; [: g9 `, }& a& W! D7 O
+ g" `  a* }9 O8 |$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
& X) a4 u/ l7 `# W7 S0 z
7 q' Z/ I  q3 |* |3 D+ {$conn = sqlsrv_connect( $serverName,$connectionInfo);
( J* {8 ~0 l) l  _, P  if( $conn == false)
' X; A# ?0 F' T  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
) n  {) o: F% ^5 g+ @+ d/ g  }
( ?2 m+ w/ h2 G  x4 g?>
; ~1 e5 c# s1 H( q" y8 B, G-------------------------------------------------------------------------
5 g, k( S6 D. m$ z望高手指点迷津

; c! ^: J5 W& G3 R# Dphp.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
' |5 `1 M) u! N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   
  extension=php_pdo_sqlsrv_55_nts.dll
* u- r: e7 [; b/ s! Z5 B; Wmssql.secure_connection = On
! D7 o: v+ b' V3 P$ Q