<?php

function yieldIncludes(string $file, &$includes, int $depth = 0): iterable
{
    if (!isset($includes[$file])) return;

    foreach (getAllLines($file) as $line) {
        $includeFile = getLineIncludeFile($line);
        if ($includeFile) {
            yield from yieldIncludes($includeFile, $includes, $depth + 1);
            unset($includes[$includeFile]);
        } else {
            if ($depth > 0 && str_starts_with($line, '<?php')) continue;
            if (empty(trim($line))) continue;
            yield $line;
        }
    }
}