How to enable OpenSSL and mcrypt support?
1. To enable mcrypt support, the system needs to have the libmcrypt.dll library installed.
Ordinary users have not installed this file, but don’t worry. This file has been included in the PHP windows distribution package. You can find it in the root directory of the PHP compressed package, and then copy it to %system% Just go to the /system32 directory.
2. To enable OpenSSL support, the system needs to install the libeay32.dll and ssleay32.dll libraries.
If you have installed OpenSSL before, these two files should already exist in your system directory; if not installed, these two files are also included in the PHP windows distribution package, copy them to %system%/ Just go to the system32 directory.