List images with pure PHP and natsort

natsort-images.php

$models3dPath = __DIR__ . '/./img/3d-models';
$models3dList = null;

if (!file_exists($models3dPath)) {
    mkdir($models3dPath, 0775, true);
}

if (file_exists($models3dPath)) {
    $files = scandir($models3dPath);
    $files = array_diff($files, array('.', '..'));

    if (count($files)) {
        $models3dList = array_map(function ($file) {
            // get full file name
            $fileName = explode('/', $file)[0];

            preg_match('/^[0-9]+-(.*)/', $fileName, $matches);

            if (count($matches)) {
                return $fileName;
            }
        }, $files);
    }
}

$models3dList = array_filter(array_filter($models3dList), 'strlen');

natsort($models3dList);

$models3dListHtml = implode('', array_map(function ($item) {
    return "<div class=\"gallery-cell work-item hover-trigger hover-3\">
    <div class=\"work-container\">
      <div class=\"work-img\">
        <a href=\"img/site-3d-modelleri/{$item}\" class=\"lightbox-img\" title=\"Lonely Forest\">
          <img src=\"img/site-3d-modelleri/{$item}\" alt=\"\">
          <div class=\"hover-overlay\" data-overlay=\"1\"></div>
        </a>
      </div>
    </div>
  </div>";
}, $models3dList));