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)
" c3 U8 I: x0 M) R2 ^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：
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
: {' `- W- q4 B# w$serverName = "(local)";
  $uid ="sa";
  $pwd = "mypwd123";
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$connectionInfo = array("UID"=>$uid,"PWD"=>$pwd,"Database"=>"phpdb");
: Z8 r( @: V' h" h( j
9 o: i" F+ ?/ R2 ]) T/ g$conn = sqlsrv_connect( $serverName,$connectionInfo);
+ b  v7 F* ^  G& j2 x  K5 A$ ~% b  if( $conn == false)
  {
  echo "连接失败！";
die( print_r( sqlsrv_errors(), true));
  }
?>
+ c, M0 O* A9 P. _9 j8 Q-------------------------------------------------------------------------
望高手指点迷津
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/ r: a  l4 C+ z# }  L$ _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
$ m8 a; {; s( l* Y8 x5 {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
% `  r$ F  c: {  [- @# f/ tmssql.secure_connection = On