Re: Amendment to String Problem

Miles Thompson <milesthompson@ns.sympatico.ca> · Thu, 10 Apr 2003 10:23:43 -0300

Well, m is more or less in the middle of the alphabet, thus you've made 
your changes, so it will bounce back and forth between n & m. Actually it's 
working perfectly, and is rather neat, although not what you intended.

Treat your password as an array, step through it, and apply the changes 
letter by letter.

Slightly OT - What are you trying to accomplish? All you are really doing 
is inverting the password -- isn't that one of the first things a cracker 
will try? (If answered earlier in thread, ignore.)

Cheers - Miles

At 10:56 PM 4/9/2003 -0400, Chris Payne wrote:
Hi there Everyone,

Here's a better example of the problem i'm having, there is probably a 
MUCH better way to do this, but here goes.

I am using the following code:

$passroutine = 'abcdefghijklmnopqrstuvwxyz';

 $passroutine = str_replace("a", "z", $passroutine);
 $passroutine = str_replace("b", "y", $passroutine);
 $passroutine = str_replace("c", "x", $passroutine);
 $passroutine = str_replace("d", "w", $passroutine);
 $passroutine = str_replace("e", "v", $passroutine);
 $passroutine = str_replace("f", "u", $passroutine);
 $passroutine = str_replace("g", "t", $passroutine);
 $passroutine = str_replace("h", "s", $passroutine);
 $passroutine = str_replace("i", "r", $passroutine);
 $passroutine = str_replace("j", "q", $passroutine);
 $passroutine = str_replace("k", "p", $passroutine);
 $passroutine = str_replace("l", "o", $passroutine);
 $passroutine = str_replace("m", "n", $passroutine);
 $passroutine = str_replace("n", "m", $passroutine);
 $passroutine = str_replace("o", "l", $passroutine);
 $passroutine = str_replace("p", "k", $passroutine);
 $passroutine = str_replace("q", "j", $passroutine);
 $passroutine = str_replace("r", "i", $passroutine);
 $passroutine = str_replace("s", "h", $passroutine);
 $passroutine = str_replace("t", "g", $passroutine);
 $passroutine = str_replace("u", "f", $passroutine);
 $passroutine = str_replace("v", "e", $passroutine);
 $passroutine = str_replace("w", "d", $passroutine);
 $passroutine = str_replace("x", "c", $passroutine);
 $passroutine = str_replace("y", "b", $passroutine);
 $passroutine = str_replace("z", "a", $passroutine);

which is SUPPOSED to replace letters, a because z and so on, but after it 
gets to m it screws up and displays:

abcdefghijklmmlkjihgfedcba

How can I do the above code in such a way that it won't produce this problem?

Any help will be greatly appreciated :-)

Regards

Chris

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