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：
- _# p* a# b  V, K" x/ |3 r! _PHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
% h3 J+ {. e4 F5 u----------------代码如下---------------
; S) L/ h8 F8 P+ p2 W* d% u0 I<?php
* m! [) s5 c" n+ @' P4 [$serverName = "(local)";
* }# u/ `6 j, ]# _! |) g5 b$ @8 ?  $uid ="sa";
1 G6 c& u' ]. o& J- b9 J5 N  $pwd = "mypwd123";
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5 j7 s; Q5 U" {" V8 `0 ?: L0 c$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
  I7 y& }+ B- y; w5 I  l
. S7 c5 F  ^2 i4 y# ]1 q6 d$conn = sqlsrv_connect( $serverName,$connectionInfo);
  if( $conn == false)
  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
  {, k/ V2 H2 F" E* A) Y?>
" C4 F. w% L" T1 _, u% P3 @0 n-------------------------------------------------------------------------
! t! h) A! R7 Q9 x( ~望高手指点迷津

1 H- s  ?& y/ ^: iphp.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
: `4 k7 n0 A1 V  Z2 I并且修改了php.ini的配置文件extension=php_sqlsrv_55_nts.dll   
( V$ u" N' M; i9 d: \  extension=php_pdo_sqlsrv_55_nts.dll
mssql.secure_connection = On

/ J' g9 J. u9 C3 U1 Z. q/ ^