> -----Original Message-----
> From: Ben Miller [mailto:[EMAIL PROTECTED]
> Sent: 23 March 2006 15:08
> To: php-general@lists.php.net
> Subject: [PHP] Letters in Loops
>
>
> In trying to make an alpha list, using the following:
>
> for($i=A;$i<=Z;$i++) {
> echo "$i";
> }
>
> Produces:
> A
> B
> C...
> X
> Y
> Z
> AA
> AB
> AC...
> AX
> AY
> AZ... all the way to YZ.
>
>
> What am I doing wrong that it's not stopping at just plain
> old "Z", without moving on to "AA" and continuing?
Well, think about it -- you have all the evidence in front of you!
If the iteration after "Z" is "AA" (which is as documented for the ++
operator on strings), when is the first time that $i<='Z' evaluates to
false, and hence your loop stops? It's when it reaches "ZA", which is,
not surprisingly, the iteration after "YZ".
So you need it to exit when you reach the value after "Z", which you can
see is "AA", thus you need to write:
for($i='A'; $i!='AA'; $i++)
You might also consider the use of:
foreach (range('A','Z') as $i)
Cheers!
Mike
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