For V10.x on PHP 5.6, you would need to hire a professional reverse engineer specializing in PHP opcodes. Expect to pay $500–$2000+ for a single file. This is legal only if you own the copyright.

Before proceeding, a serious warning. Searching for "Ioncube Decoder V10.x Php 5.6" leads to domains offering executable files (.exe), fake PHP scripts, or remote services. These pose severe risks:

Do not run any untrusted decoder on a production or development machine. Use isolated virtual machines if you must test suspicious tools.

If you only need to run the script (not modify it), install the official IonCube Loader for PHP 5.6. It is free and reliable.

You might be trying to decode a "nulled" (pirated) WordPress plugin or Laravel script. Don't.