If you do not need to see the source code, only execute the script, then you don’t need a decoder. You need the , which is 100% legal and free.
This is the most common motivation. You bought a script, but the original developer went out of business, or you want to modify the behavior but the code is encrypted.
(often referred to as a "deobfuscator" or "unpacker") is a tool designed to reverse the encoding process. The goal is to take a compiled, unreadable PHP file and restore it to a human-readable source code format.
: Request an unencoded version or a specific hook/API for your customizations. Use Hooks/Plugins