Using a repack means participating in software theft. Independent PHP developers often encode their work to protect years of labor. By decoding, you are actively harming the ecosystem.
The ionCube Loader 1.1.6 is compatible with PHP 8.1, but there are specific requirements and recommendations: ioncube decoder php 81 repack
If the encoded file is not explicitly compiled for PHP 8.1 (most older scripts are for PHP 7.x), you might run the script on PHP 7.4 with an appropriate loader. You can then use older, less-secure (but legitimate) debugging tools to dump the OParray. However, this still does not yield pretty source code. Using a repack means participating in software theft
To run these files, a server must have the ionCube Loader installed, which acts as a real-time translator. which acts as a real-time translator.