This rule is pretty useless. It requires file to be of a specific size and it requires function names not to be obfuscated. One could simply add a space between

This rule is pretty useless. It requires file to be of a specific size and it requires function names not to be obfuscated. One could simply add a space between 'md5' and 'strrev' to bypass this rule. And they replaced digits in 'base64_decode' with regexp as if there were other similar functions.