I have Windows 10 with WAMP server (Apache 2.4.9, PHP 5.5.29 VC11 x64, e MySQL). All works fine, but now I will use curl extension.
I go into C:\\wamp\\bin\\ph
These steps worked for me:
Add the Apache bin folder onto the Path Env variable in Windows
Copy the file libssh2.dll from the php folder to apache's bin folder (Apache seems to need this for php's curl to work in Windows)