Apache 2.4.23 PHP7.x Windows 10 x64 php_curl not w

I was trying to upgrade my server to latest Apache 2.4.23 and PHP 7.1 but it fail to load php_curl library, don't know why.

PHP Warning:  PHP Startup: Unable to load dynamic library 'ext\\php_curl.dll' - The specified procedure could not be found.\r\n in Unknown on line 0

I have tried followings

Change extension path to full path like d:\webserver\php\ext
Copy php_curl.dll, libssh2.dll, libeay32.dll, ssleay32.dll to System32, php/ext, apache/bin, php
Added php path system variable
Have tried both PHP7 and PHP7.1
All of these are x64 and all other extension loaded successfully and server working but only php_curl is not working
uncommented extension in php.ini

Apache 2.4.23 x64
PHP7 and Also tried PHP7.1 (Thread Safe) x64
Windows 10 x64

Solution: Put libeay32.dll, libssh2.dll, ssleay32.dll files under dir specified in httpd.conf's ServerRoot directive. These dlls can be found compiled under php root folder.

Reasons:

Problem is php_curl.dll requires to access following libraries while loading: libeay32.dll, libssh2.dll, ssleay32.dll and it does not make sense if you put them in ./php/ext dir or if you put php extensions in php root dir.

Of course you can put them in c:\Windows or in some global folder defined in PATH but if you dont want to do this and you want that your apache+php installation was portable:

The path specified in ServerRoot in httpd.conf is treated as home path for php. The behaviour is similar to situation where you include ./path/to/some.php file in ./index.php and home path for some.php file is still ./ the dir where index.php resides.

In shorts just put those three dlls right in dir you specified in httpd.conf ServerRoot directive and php_curl.dll will not fail to load again.