Algorithm: variable replacement

[Quirinus]

If there's a longer variable name that contains a smaller variable name, it might get wrongly replaced.
Should find a way to replace that fixes that. Probably check if some variable names contain others, and then replace in such a way that they don't double replace and mess things up. I guess this isn't an issue as long Zippyshare doesn't use variable names that are longer than one character.

[Eric678]

It is a problem if those single letter variable names match other text - here is the resulting $algorithm_variables_code just before eval() attempted:
v$ar $a = fun$ction() {return 1};
v$ar $b = fun$ction() {return $a() + 1};
v$ar $c = fun$ction() {return $b() + 1};
v$ar $d = $do$cument.getElementByI$d('omg').getAttri$bute('$cl$ass'); if (true) { $d = $d*2;}