Question

Is threre a way to encode something like this :

eval("echo 'String';");

with base64_encode, and then to call base64_decode and get the result String without any echo or additional eval functions?

Answer 1

You are asking for base64_decode to execute arbitrary code? That doesn’t work. It operates on data, not code, and so whatever you decode has to be a data string. Can’t you just encode 'String' directly? Otherwise, you’ll have to run eval again to turn data into code: eval(base64_decode($mysterydata));.