public boolean defineConstant(String name, Memory value, boolean caseSensitise) {
        Memory constant = findConstant(name);
        if (constant != null)
            return false;

        constantMap.put(name.toLowerCase(), new ConstantEntity(name, value, caseSensitise));
        return true;
    }
Remove all method which does not destruct

@throws Throwable
jphp-runtime/src/php/runtime/env/Environment.java