Seperating a string, applying something to each letter, then connecting the string?

[FoxhoundX]

Okay, what I am trying to achieve is a basic encryption. I was the user to enter a string into a fox, any length, it will pass it to the next page, count the # of letters, then every letter will go up by one a=b, b=c, z=a, etc, then the string will be reattached.

Any ideas?

[sijis]

i'm thinking you can use an array to give a certain number a letter.

$letter = array('a','b','c','d',.......);
so $letter[1] will be letter 'b'.
just modify above for your needs.

you can get a string's length with strlen() function.

hmm. maybe this function str_rot13() might help.

good luck.

[FoxhoundX]

Yea, figured out a way to do it already using substr 🙂

Now I'm looking for a way to subtract one from a letter...

for ex.

$stringtest = 'a';
$stringtest++;
echo $stringtest;

would echo 'b', but $stringtest--; doesnt do anything 🙁