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)
# _& X2 K6 U1 l; zPHP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---------------
<?php
$serverName = "(local)";
  $uid ="sa";
6 s' N# u4 c$ L1 L/ S) Z  $pwd = "mypwd123";
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$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
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$conn = sqlsrv_connect( $serverName,$connectionInfo);
  if( $conn == false)
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" n4 ?/ i# |) q9 B# |+ A# e0 ?1 T  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
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?>
-------------------------------------------------------------------------
望高手指点迷津
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php.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
并且修改了php.ini的配置文件extension=php_sqlsrv_55_nts.dll   
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- h( l  s+ R& x+ E3 Amssql.secure_connection = On
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