win7 64位系统，apache24,PHP5.6.6。 除了将PHP.ini中的;extension=php_curl.dll前面的";"去掉，还需要如下操作， I
had to also also copy libssh2.dll into my Apache24 folder for this to
work with my PHP 5.6.2 installation. So altogether I had to do the
following:
Move to Windows\system32 folder: libssh2.dll, php_curl.dll, ssleay32.dll, libeay32.dll
