Php Security-php code protection

1. how to protect your PHP code? Prevent leakage. I only know that there is an encrypted zendguard, but it is not actually used. is it Undecrypted after this encryption? 2. like mainstream DISCUZ, PHPCMS, and ECSTORE, what is their copyright protection? In what way does he notify his server that he has written PHP code? Prevent leakage. I only know that there is an encrypted zend guard, but it is not actually used. is it Undecrypted after this encryption?
2. what is their copyright protection like mainstream DISCUZ, PHPCMS, and ECSTORE? How does he notify his server that unauthorized websites are running?

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1. how to protect your PHP code? Prevent leakage. I only know that there is an encrypted zend guard, but it is not actually used. is it Undecrypted after this encryption?
2. what is their copyright protection like mainstream DISCUZ, PHPCMS, and ECSTORE? How does he notify his server that unauthorized websites are running?

Php is an interpreted language and cannot be used to prevent leaks, because it is always extracted during running.
All you can do is obfuscation.Zend guardThe principle is to change both the variable name and function name to a large string of garbled characters, making reading more difficult.

The mainstream copyright protection relies on legal restrictions. it is useless to write authorization in code, where the source code is, and modification and bypass cannot be completed. Another constraint is after-sales ~

The source code base of the Ecstore source code of the business school is all encrypted. when the business authorization is performed, the source code of each set is configured with a serial number to bind with the machine, there are also domain names that must be filed with the business school.