index.php

<?php

// Redirect to HTTPS if HTTPS_REDIRECT is defined in environment variables
if (getenv('ADMINER_HTTPS_REDIRECT') === 'true' && (empty($_SERVER['HTTPS']) || $_SERVER['HTTPS'] === 'off')) {
	header('HTTP/1.1 301 Moved Permanently');
	header('Location: https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
	exit();
}

define('ASSETS_VERSION', '1');

if (empty($_GET['file'])) {
	ob_start(function ($s) {
		return preg_replace_callback('#(<(link|script)\s[^>]*(href|src)=")(adminer\.css|static/.+)(\?v=\d+)?"#U', function ($m) {
			return $m[1] . '?file=' . urlencode($m[4]) . '&amp;version=' . ASSETS_VERSION . '"';
		}, $s);
	}, 4096);

} elseif (preg_match('#^(default|adminer|static(/\w[\w.-]*)+)\.(\w+)\z#', $_GET['file'], $m)) {
	if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
		header('HTTP/1.1 304 Not Modified');
		exit;
	}

	header('Expires: ' . gmdate('D, d M Y H:i:s', strtotime('1 month')) . ' GMT');
	header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');

	$types = ['css' => 'text/css', 'js' => 'text/javascript', 'gif' => 'image/gif', 'png' => 'image/png'];
	if (isset($types[$m[3]])) {
		header('Content-Type: ' . $types[$m[3]]);
	}
	@readfile(__DIR__ . '/' . $_GET['file']);
	exit;
}

include __DIR__ . '/adminer.php';