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)
* l, j% f( \% i5 D3 }# ^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：
4 O5 Z/ X" `9 C  Q( gPHP Fatal error: Call to undefined function sqlsrv_connect() in E:\wwwroot\php.com\test\2.php on line 11
( ]2 L% ?2 {8 P/ D5 r, b----------------代码如下---------------
<?php
$serverName = "(local)";
/ A! g  F  ^9 s: a& h6 w  $uid ="sa";
/ r0 R1 \0 \/ q9 X* q  $pwd = "mypwd123";

: d  v( j/ ~: _9 T* o2 n$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");

$conn = sqlsrv_connect( $serverName,$connectionInfo);
  if( $conn == false)
  {
+ ^8 I6 P4 c6 E1 c  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
?>
3 V4 b: C* A0 k% {-------------------------------------------------------------------------
望高手指点迷津

php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
* ^* D$ u/ W1 T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
, ]+ r! h! U! I并且修改了php.ini的配置文件extension=php_sqlsrv_55_nts.dll   
. v7 J$ Q' y$ J  extension=php_pdo_sqlsrv_55_nts.dll
mssql.secure_connection = On