Elgg: in HTML pages, logs the PHP included file paths to the JS console

elgg-included-files.php

<?php
// Don't use in production!
// Does not cover shutdown event activities.

elgg_register_plugin_hook_handler('output', 'page', function ($h, $t, $html, $p) {
	if (false === strpos($html, '</body>')) {
		return;
	}

	$root = elgg_get_root_path();
	$root_len = strlen($root);

	$data_root = elgg_get_data_path();
	$data_root_len = strlen($data_root);

	$stats = [];

	// does not include non-include file reads
	foreach (get_included_files() as $file) {
		// rewrite paths
		if (0 === strpos($file, $root)) {
			$file = "<elgg>/" . substr($file, $root_len);
		} elseif (0 === strpos($file, $data_root)) {
			$file = "<data>/" . substr($file, $data_root_len);
		}

		// build stats
		$stats['all'][] = $file;

		if (0 === strpos($file, '<elgg>/views/') || preg_match('~^<elgg>/mod/[^/]+/views/~', $file)) {
			$stats['view files'][] = $file;

		} elseif (0 === strpos($file, '<elgg>/engine/classes/')) {
			$stats['core classes'][] = substr($file, strlen('<elgg>/engine/classes/'));
		} elseif (0 === strpos($file, '<elgg>/engine/')) {
			$stats['core others'][] = substr($file, strlen('<elgg>/engine/'));
		} elseif (preg_match('~<elgg>/vendor/([^/]+/[^/]+)/~', $file, $m)) {
			$stats['vendor'][$m[1]][] = substr($file, strlen($m[0]));
		} elseif (0 === strpos($file, '<elgg>/mod/')) {
			$stats['plugin files'][] = substr($file, strlen('<elgg>/mod/'));
		} else {
			$stats['others'][] = $file;
		}
	}

	$script = "<script>console.log('PHP include()s:', " . json_encode($stats) . ");</script>";

	$html = str_replace('</body>', "$script</body>", $html);

	return $html;
});