Excel columns letters using LazyCollection

columns.php

<?php

use Illuminate\Support\LazyCollection;

$columns = LazyCollection::make(function() {
	yield $i = 1 => $c = 'A';

	while (true) {
		yield ++$i => $c = str_increment($c);
	}
});

$columnIndexes = $columns->flip();

dump([...$columns->skip(51)->take(17)]);