: Publicly available "decoders" for modern PHP versions (8.1+) are generally non-existent or unreliable. Because ionCube translates PHP into a custom bytecode format, restoration to original source code is a complex process involving opcode mapping that changes with every major PHP release. Security Lifecycle
For PHP 8.1, the loader validates the Zend Engine ABI version (ZEND_MODULE_API_NO = 20210902). Without the exact loader, decoding fails. ioncube decoder php 8.1