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)
* ?5 j6 n) Q" ?* ~& [0 h$ k: QPHP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---------------
9 C- p; e1 ?1 d2 P<?php
; Y5 o& _+ W3 c/ J$serverName = "(local)";
1 J1 t+ \+ J& R7 I  $uid ="sa";
  $pwd = "mypwd123";
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$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
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$conn = sqlsrv_connect( $serverName,$connectionInfo);
  if( $conn == false)
- m' |: K' c0 E$ p* B  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
; ^8 e. ^* U% U  }
?>
, N+ V6 ^! Q7 q-------------------------------------------------------------------------
4 p+ d9 ]8 C" T& b望高手指点迷津
: o, r& V' k. x
php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
5 U1 A3 e) n7 ?9 b9 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
mssql.secure_connection = On

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