[RESOLVED] Altering last letter of string

[Jon12345]

I have this code: $sub=$_GET['sub'];

It gets a variable which typically looks like this: 00100004005324ABCo

I want to create another variable called subtest which will store the string above except changes the last character to an x.

How can I do that?

Thanks,

Jon

[devinemke]

$sub = '00100004005324ABCo';
echo substr($sub, 0, -1) . 'x';

[Jon12345]

Ahh thank you! 🙂