base64_encode一个eval（）;

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)); .

Answer 2

eval('die(base64_decode("bla"))');

something like this?

if you want to obfuscate your code have a look at this site: http://demo.dmwtechnologies.com/PHP/PhpObfuscator/index.php

Answer 3

不是在eval带有echo ，但是如何呢？：

echo base64_decode(base64_encode(eval("return 'String';")));