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：
9 W& s% q% I: ?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
$serverName = "(local)";
  r8 H( j; s% L7 w/ I$ J+ L  $uid ="sa";
2 f7 B! T% b/ y3 x  $pwd = "mypwd123";
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$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
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$conn = sqlsrv_connect( $serverName,$connectionInfo);
* I. F! s0 }$ B  if( $conn == false)
9 K0 ^" b7 h' M( Q4 L+ P5 w  {
3 p9 `' P1 c+ w& B# S4 T  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
* y3 k! Y) ?( @% ^  A: E?>
7 v: S( H' t6 w. l5 s+ Q$ m-------------------------------------------------------------------------
望高手指点迷津

php.net里下载php-5.5.24-nts-Win32-VC11-x64.zip
8 ^! \2 r' V( {7 _. S4 t' B6 j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
& ~8 J+ V# N2 H  D3 h并且修改了php.ini的配置文件extension=php_sqlsrv_55_nts.dll   
0 T* {9 m( p+ ?1 B+ {! j  extension=php_pdo_sqlsrv_55_nts.dll
+ S' T. R' ?+ W0 R/ gmssql.secure_connection = On
$ R& }5 p5 U7 z+ S* `# j" r
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