Symfony has the Process package, it has the PHP code isolation function PhpProcess, can you explain the isolation principle?

Question

symfony

Symfony has the Process package, it has the PHP code isolation function PhpProcess, can you explain the isolation principle? How reliable is it from all sorts of malicious code, if I correctly understood its purpose.

Answer 1

How reliable is it from all sorts of malicious code, if I correctly understood its purpose.

Not right. It is needed to execute PHP code in a neighboring process (isolated from the current code).
It will execute any "malicious" code as is.