<?php
// Global variables
$_dr = $_SERVER['DOCUMENT_ROOT'];

// Parse path into array
// (e.g."/hello////13/thing" into ["hello", "13", "thing"])
$GLOBALS['PARSED_PATH'] = (function () {
  /* - Usage of '#' as delimiters to be able to use '/' without escaping
   * - (a|b) checks patterns a or b and captures it, (?:a|b) doesn't capture
   *
   *  - (?:/|) is there to remove the first '/'
   *  - ([^/]+?) gets the content in a non-greedy way
   *  - (?:/|$) limits the capture to the next '/' or the end of the string
   */
  preg_match_all('#(?:/|)([^/]+?)(?:/|$)#', $_SERVER['DOCUMENT_URI'], $matches);

  // If it doesn't find anything, it is the root
  $matches[1][0] = $matches[1][0] ?? '';

  // We don't care about the full pattern, just the captured group
  return $matches[1];
})();

match ($GLOBALS['PARSED_PATH'][0]) {
  '' => include_once "$_dr/pages/index.php",
  default => printf("404"),
};