--- /dev/null
+<?php
+
+// Get a $_SERVER key, or equivalent environment variable
+// if it is not set in $_SERVER.
+function runserver_env($key) {
+ if (isset($_SERVER[$key])) {
+ return $_SERVER[$key];
+ }
+ else {
+ return getenv($key);
+ }
+}
+
+$url = parse_url($_SERVER["REQUEST_URI"]);
+if (file_exists('.' . urldecode($url['path']))) {
+ // Serve the requested resource as-is.
+ return FALSE;
+}
+
+// We set the base_url so that Drupal generates correct URLs for runserver
+// (e.g. http://127.0.0.1:8888/...), but can still select and serve a specific
+// site in a multisite configuration (e.g. http://mysite.com/...).
+$base_url = runserver_env('RUNSERVER_BASE_URL');
+
+// The built in webserver incorrectly sets $_SERVER['SCRIPT_NAME'] when URLs
+// contain multiple dots (such as config entity IDs) in the path. Since this is
+// a virtual resource, served by index.php set the script name explicitly.
+// See https://github.com/drush-ops/drush/issues/2033 for more information.
+// Work around the PHP bug. Update $_SERVER variables to point to the correct
+// index-file.
+$path = $url['path'];
+$script = 'index.php';
+if (strpos($path, '.php') !== FALSE) {
+ // Work backwards through the path to check if a script exists. Otherwise
+ // fallback to index.php.
+ do {
+ $path = dirname($path);
+ if (preg_match('/\.php$/', $path) && is_file('.' . $path)) {
+ // Discovered that the path contains an existing PHP file. Use that as the
+ // script to include.
+ $script = ltrim($path, '/');
+ break;
+ }
+ } while ($path !== '/' && $path !== '.');
+}
+
+// Update $_SERVER variables to point to the correct index-file.
+$index_file_absolute = $_SERVER['DOCUMENT_ROOT'] . DIRECTORY_SEPARATOR . $script;
+$index_file_relative = DIRECTORY_SEPARATOR . $script;
+
+// SCRIPT_FILENAME will point to the router script itself, it should point to
+// the full path of index.php.
+$_SERVER['SCRIPT_FILENAME'] = $index_file_absolute;
+
+// SCRIPT_NAME and PHP_SELF will either point to index.php or contain the full
+// virtual path being requested depending on the URL being requested. They
+// should always point to index.php relative to document root.
+$_SERVER['SCRIPT_NAME'] = $index_file_relative;
+$_SERVER['PHP_SELF'] = $index_file_relative;
+
+// Require the script and let core take over.
+require $_SERVER['SCRIPT_FILENAME'];
\ No newline at end of file