Online PHP editor | output for MFcFR

<?php const URLS = [ "http://site.com/", "http://site.com/save", "http://site.com/save/results", "http://site.com/save/results/path", "http://site.com/path/save/results", "http://site.com/save/path", "http://site.com/path/results", "http://site.com/Crawler4", "http://site.com/Crawler", ]; $siteStructure = []; foreach (URLS as $url) { // Parse the URL into components ['scheme' => $scheme, 'host' => $host, 'path' => $path] = parse_url($url); // build the slug for the top-level element $realm = $scheme . '://' . $host; // create the top levekl element and get a reference to it $siteStructure[$realm] = $siteStructure[$realm] ?? []; $current = &$siteStructure[$realm]; // parse the path into parts $pathEls = preg_split('/[^a-zA-Z0-9]+/', $path, 0, PREG_SPLIT_NO_EMPTY); foreach ($pathEls as $el) { // for each part, make sure the child array exists and overwrite the reference to the child $current[$el] = $current[$el] ?? []; $current = &$current[$el]; } // delete the reference at the end of the loop to prevent accidents unset($current); } var_dump($siteStructure);