PHP int to string

Question

I know that in PHP you can declare a variable A and then if you increment it in a loop it will go A,B,C,....X,Y,Z,AA,AB,AC

Is there any php function to convert an integer to the corresponding string in that format

Answer 1

I started with Tor P's answer and I think this works as desired:

function numToString($i) {
    if($i < 26) {
        return chr(65 + $i);
    } else {
        $i -= 26;
        $r = $i % 26;
        return numToString($i - $r).chr(65 + $r);
    }
}

Answer 2

The closest thing to that format is base_convert, but it uses the 0-9A-Z charset.

You can use base 26, and then shift the charset.

Answer 3

use the chr function with the int transformed into an ascii code (capital letters go from 65-90), so 65+i, to use i >= 26 you have to do one letter at a time

so, something like this...

function noToString($i) {
  if($i < 26) return chr(65+$i);
  else return noToString($i-26).chr(65+$i%26);
}