4 Letter incremental string generator

[imperium2335]

Hi,

 

What would be the best way to generate an incremental 4 letter string that would start off like this:

 

0A, 0B, 0C ....4AB, 4AC, 4AD....50A, 50B...53AA,53AB...7A0,7A1,7A2...etc etc and stop at something like 9999 or ZZZZ?

 

So I could get all possible combinations of letters and numbers really.

[requinix]

Do you want an array of all of them? At once? At 0-9 A-Z that's more than 1.7 million combinations. There's a risk that PHP will run out of memory before it can grab them all.

[imperium2335]

Hi,

 

RAM isn't a problem for me, but what I want to happen is for it to go through every possible combination one by one.

 

I thought of an array but there will be so many like you said, 1.7mil!

 

Once they have gone through the loop they don't need to be stored.

 

As an example:

 

while($combination != $thelastpossiblecombination) {

echo $combination ;
}

[requinix]

Well, there's always the brute-force solution:

$chars = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$_code = "    ";

for ($a = 0; $a for ($b = 0; $b for ($c = 1; $c for ($d = 1; $d 	$code = ltrim($_code);

// ...
}}}}

[imperium2335]

thanks! That's exactly what I wanted That's a lot of combinations