“Heads up – unofficial loaders can break opcache and security. Suggest running a separate PHP-FPM 7.3 pool instead of patching 7.4.”
Decoding files without the author's permission is generally a violation of and intellectual property laws.
[SOLVED] Decoding ic11x encoded files for PHP 7.4 – exclusive workaround found
Because of this, a true "decoder" that returns the original, commented, and perfectly formatted source code does not officially exist. Most "decoders" simply attempt to decompile the bytecode back into a rough, often broken version of PHP.