asvae/gist:801378550cb4310a6390c65806142aec

## gistfile1.txt
<?php

use League\Flysystem\Adapter\Local;
use League\Flysystem\Filesystem;

require_once($_SERVER["DOCUMENT_ROOT"] . '/autoload/bootstrap.php');

$path = 'baldr_sky_manual/manual';

$dir = new Filesystem(new Local($_SERVER["DOCUMENT_ROOT"]));
$files = $dir->listContents($path, true);

$files = collect($files)->where('extension', 'htm');

foreach ($files as $file) {
    $newPath = "baldr_sky_manual/manual_converted/{$file['basename']}l";

    $contents = $dir->read($file['path']);
    $contents = mb_convert_encoding($contents, 'UTF-8', 'SJIS');
    $contents = trim($contents);
    $contents = str_replace('<html>', '<!doctype html><html lang="jp">', $contents);
    $contents = str_replace('<head>', '<head><meta charset="UTF-8">', $contents);
        $dir->put($newPath, $contents);
}

dd('Okay!');
	<?php

	use League\Flysystem\Adapter\Local;
	use League\Flysystem\Filesystem;

	require_once($_SERVER["DOCUMENT_ROOT"] . '/autoload/bootstrap.php');

	$path = 'baldr_sky_manual/manual';

	$dir = new Filesystem(new Local($_SERVER["DOCUMENT_ROOT"]));
	$files = $dir->listContents($path, true);

	$files = collect($files)->where('extension', 'htm');

	foreach ($files as $file) {
	$newPath = "baldr_sky_manual/manual_converted/{$file['basename']}l";

	$contents = $dir->read($file['path']);
	$contents = mb_convert_encoding($contents, 'UTF-8', 'SJIS');
	$contents = trim($contents);
	$contents = str_replace('<html>', '<!doctype html><html lang="jp">', $contents);
	$contents = str_replace('<head>', '<head><meta charset="UTF-8">', $contents);
	$dir->put($newPath, $contents);
	}

	dd('Okay!');