itchief/slider.php

## slider.php
<?php

$template = <<<HTML
<!doctype html>
<html lang="ru">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>ChiefSlider</title>
  <link rel="stylesheet" href="/examples/libs/chief-slider/chief-slider-with-prefixes.min.css">
  <script defer src="/examples/libs/chief-slider/chief-slider.min.js"></script>
  <script>
    document.addEventListener('DOMContentLoaded', function () {
      const slider = new ChiefSlider('.slider', {
        loop: false
      });
    });
  </script>
  <style>
    *,
    *::before,
    *::after {
      -webkit-box-sizing: border-box;
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
        'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji',
        'Segoe UI Symbol';
    }

    .container {
      max-width: 800px;
      margin: 0 auto;
    }

    .slider__container {
      padding-left: 0;
      padding-right: 0;
    }

    .slider__items {
      counter-reset: slide;
    }

    .slider__item {
      -webkit-box-flex: 0;
      -ms-flex: 0 0 100%;
      flex: 0 0 100%;
      max-width: 100%;
      counter-increment: slide;
      position: relative;
    }

    .slider__item::before {
      content: counter(slide) "/4";
      position: absolute;
      top: 10px;
      right: 20px;
      color: #fff;
      font-style: italic;
      font-size: 32px;
      font-weight: bold;
      display: block;
    }

    img {
      display: block;
      width: 100%;
      height: auto;
    }
  </style>
</head>

<body>

  <div class="container">

    <div class="slider">
      <div class="slider__container">
        <div class="slider__wrapper">
          <div class="slider__items">{{items}}</div>
        </div>
      </div>
    <a href="#" class="slider__control" data-slide="prev"></a>
    <a href="#" class="slider__control" data-slide="next"></a>
  </div>
</div>
</body>

</html>
HTML;

$items = [];
$path = '/examples/images/slider-images/';
$path = $_SERVER['DOCUMENT_ROOT'] . '/examples/images/slider-images/';
$images = glob($path . '*.jpg');
foreach($images as $image) {
  $image = str_replace($_SERVER['DOCUMENT_ROOT'], '', $image);
  $items[] = '<div class="slider__item"><img src="' . $image .'"></div>';
}

$html = str_replace('{{items}}', implode('', $items), $template);

echo $html;
	<?php

	$template = <<<HTML
	<!doctype html>
	<html lang="ru">

	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>ChiefSlider</title>
	<link rel="stylesheet" href="/examples/libs/chief-slider/chief-slider-with-prefixes.min.css">
	<script defer src="/examples/libs/chief-slider/chief-slider.min.js"></script>
	<script>
	document.addEventListener('DOMContentLoaded', function () {
	const slider = new ChiefSlider('.slider', {
	loop: false
	});
	});
	</script>
	<style>
	*,
	*::before,
	*::after {
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
	}

	body {
	margin: 0;
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
	'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji',
	'Segoe UI Symbol';
	}

	.container {
	max-width: 800px;
	margin: 0 auto;
	}

	.slider__container {
	padding-left: 0;
	padding-right: 0;
	}

	.slider__items {
	counter-reset: slide;
	}

	.slider__item {
	-webkit-box-flex: 0;
	-ms-flex: 0 0 100%;
	flex: 0 0 100%;
	max-width: 100%;
	counter-increment: slide;
	position: relative;
	}

	.slider__item::before {
	content: counter(slide) "/4";
	position: absolute;
	top: 10px;
	right: 20px;
	color: #fff;
	font-style: italic;
	font-size: 32px;
	font-weight: bold;
	display: block;
	}

	img {
	display: block;
	width: 100%;
	height: auto;
	}
	</style>
	</head>

	<body>

	<div class="container">

	<div class="slider">
	<div class="slider__container">
	<div class="slider__wrapper">
	<div class="slider__items">{{items}}</div>
	</div>
	</div>
	<a href="#" class="slider__control" data-slide="prev"></a>
	<a href="#" class="slider__control" data-slide="next"></a>
	</div>
	</div>
	</body>

	</html>
	HTML;

	$items = [];
	$path = '/examples/images/slider-images/';
	$path = $_SERVER['DOCUMENT_ROOT'] . '/examples/images/slider-images/';
	$images = glob($path . '*.jpg');
	foreach($images as $image) {
	$image = str_replace($_SERVER['DOCUMENT_ROOT'], '', $image);
	$items[] = '<div class="slider__item"><img src="' . $image .'"></div>';
	}

	$html = str_replace('{{items}}', implode('', $items), $template);

	echo $html;