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)
0 l. y9 C! l9 D0 b3 j: BPHP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
; i  I) K$ h$ m2 U6 ^----------------代码如下---------------
" R) t7 p# }% n% j2 l8 {<?php
$serverName = "(local)";
( q' t4 s4 p3 G& I/ w  $uid ="sa";
) C" Q, O  F0 @5 w4 c  $pwd = "mypwd123";

$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");

5 d8 F8 n# q1 R2 ~7 P+ w  i$conn = sqlsrv_connect( $serverName,$connectionInfo);
/ d; e1 G$ g8 X: H9 @7 x  if( $conn == false)
  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
0 P8 v# h: M2 r7 m$ Z& B& H  }
?>
- `0 [6 O) P4 `2 |8 B-------------------------------------------------------------------------
望高手指点迷津
( T% ~5 E* O. r& C1 X
php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
8 h7 J" t7 X& i, t: W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   
4 V8 K& X7 b0 t, [1 e  extension=php_pdo_sqlsrv_55_nts.dll
" L1 Q; |3 W" y6 ^8 ?9 Smssql.secure_connection = On
1 ~8 t/ l: u8 O# e