PHP - loop through letters

Question

I am trying to loop through letters rather than numbers.

I am trying to do this using chr and the number equivalent but it doesn't seem to be happening!

I want four letter loop.

So AAAA, AAAB, AAAC etc through to ZZZZ - and yes I know this will likely take a while to execute!

Answer 1

Why don't you make an array of letters and then use nested loops:

$letters = range('A', 'Z');  foreach ($letters as $one) {   foreach ($letters as $two) {     foreach ($letters as $three) {       foreach ($letters as $four) {         echo "$one$two$three$four";       }     }   } } 

Answer 2

for( $x = "AAAA"; ; $x++) {     echo $x."\n";     if( $x == "ZZZZ") break; } 

Incrementing a letter will cycle it through the alphabet similar to the column names in Excel.