diff --git a/.gitmodules b/.gitmodules
index dcea89f..189fa48 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,12 @@
[submodule "mdAvailableLicenses"]
path = mdAvailableLicenses
url = /var/www/vhosts/museum-digital.de/git-base/mdAvailableLicenses
+[submodule "classes/MD_STD"]
+ path = classes/MD_STD
+ url = /var/www/vhosts/museum-digital.de/git-base/MD_STD
+[submodule "classes/MDErrorReporter"]
+ path = classes/MDErrorReporter
+ url = /var/www/vhosts/museum-digital.de/git-base/MDErrorReporter
+[submodule "classes/MDAllowedValueSets"]
+ path = classes/MDAllowedValueSets
+ url = /var/www/vhosts/museum-digital.de/git-base/MDAllowedValueSets
diff --git a/classes/MDAllowedValueSets b/classes/MDAllowedValueSets
new file mode 160000
index 0000000..3d96d0d
--- /dev/null
+++ b/classes/MDAllowedValueSets
@@ -0,0 +1 @@
+Subproject commit 3d96d0df89529c407fa013b054034c083b0d73ce
diff --git a/classes/MDErrorReporter b/classes/MDErrorReporter
new file mode 160000
index 0000000..c6aeec1
--- /dev/null
+++ b/classes/MDErrorReporter
@@ -0,0 +1 @@
+Subproject commit c6aeec1d2fb40654236a17b5f4f5feb28c7ee0f2
diff --git a/classes/MD_STD b/classes/MD_STD
new file mode 160000
index 0000000..a09eba6
--- /dev/null
+++ b/classes/MD_STD
@@ -0,0 +1 @@
+Subproject commit a09eba6b843804c33eeff7205b8a376d4e46724b
diff --git a/functions/functions.php b/functions/functions.php
index 68c0216..1f7fa4c 100644
--- a/functions/functions.php
+++ b/functions/functions.php
@@ -8,6 +8,178 @@
*/
declare(strict_types = 1);
+// Set autoloader
+spl_autoload_register("mdCsvxmlAutoloader");
+set_exception_handler("mdExceptionHandler");
+set_error_handler("mdErrorHandler", E_ALL);
+
+/**
+ * Autoloader for museum-digital.org.
+ *
+ * @param string $className Name of the class to load.
+ *
+ * @return void
+ */
+function mdCsvxmlAutoloader(string $className):void {
+
+ $classDirs = [
+ __DIR__ . "/../classes/MDTlLoader",
+ __DIR__ . "/../classes/MD_STD",
+ __DIR__ . "/../classes/MDAllowedValueSets/src",
+ __DIR__ . "/../classes/MDExportFormats/src",
+ __DIR__ . "/../classes/MDErrorReporter",
+ __DIR__ . "/../classes/MDErrorReporter/exceptions/generic",
+ __DIR__ . "/../classes/MDErrorReporter/exceptions/page",
+ __DIR__ . "/../classes/MDErrorReporter/exceptions/updates",
+ ];
+
+ foreach ($classDirs as $classDir) {
+
+ if (file_exists("$classDir/$className.php")) {
+ include "$classDir/$className.php";
+ return;
+ }
+
+ }
+
+}
+
+/**
+ * Own error handler: Set to enforce exit on any error.
+ *
+ * @param integer $errno Error number.
+ * @param string $string Error message.
+ * @param string $file File in which the error occured.
+ * @param integer $line Line number.
+ *
+ * @return void
+ */
+function mdErrorHandler(int $errno, string $string, string $file, int $line):void {
+
+ $getStr = [];
+ foreach ($_GET as $key => $value) {
+ if (is_array($value)) continue;
+ $getStr[] = $key . "=" . $value;
+ }
+
+ $userMsg = "";
+ if (isset($_SESSION['anmnam'])) $userMsg .= " User: " . $_SESSION["anmnam"];
+ if (isset($_SESSION['username'])) $userMsg .= " (" . $_SESSION["username"] . ")";
+ if ($userMsg) $userMsg = " |--" . $userMsg;
+
+ $errorMsg = "";
+
+ if (!empty($_SERVER) && !empty($_SERVER["HTTP_HOST"])) {
+
+ $errorPage = $_SERVER['PHP_SELF'] . "?" . implode("&", $getStr);
+ $errorPageFull = "https://" . $_SERVER["HTTP_HOST"] . $errorPage;
+
+ $errorMsg = "*$errno ($string) at $file: line_ $line _";
+ $errorMsg .= $userMsg;
+ $errorMsg .= " |-- Error generating page: $errorPage";
+ $errorMsg .= " |-- Used RAM / Peak RAM / Allowed: " . human_filesize((string)memory_get_usage()) . " / " . human_filesize((string)memory_get_peak_usage()) . " / " . ini_get("memory_limit");
+
+ $errorMsg = str_replace(PHP_EOL, " ", $errorMsg);
+
+ error_log($errorMsg);
+
+ }
+
+ if ($errno == E_ERROR) exit;
+
+}
+
+/**
+ * Exception handler to also be able to handle custom exceptions.
+ *
+ * @param Throwable $exception Exception.
+ *
+ * @return void
+ */
+function mdExceptionHandler(Throwable $exception):void {
+
+ $formatErrorPage = function(string $errorMsg = "", string $versionName = "") :string {
+
+ if (PHP_SAPI === "cli") {
+ return $errorMsg . PHP_EOL;
+ }
+
+ $output = '
+
+
+
+
+
+
+
+
+
+
+ ';
+ if (!empty($_SESSION['dark-theme'])) $output .= '
+ ';
+ $output .= '
+ Error :: ';
+ $output .= $versionName;
+ $output .= '
+
+
+
+
+ 
+ ' . $errorMsg . '
+
+
+
+
+
+
+';
+
+ return $output;
+ };
+
+ $errorReporter = new MDErrorReporter("md:csvxml", "bugs-csvxml@museum-digital.de");
+ $errorCategory = MDErrorReporter::categorizeError($exception);
+
+ http_response_code(404);
+
+ switch ($errorCategory) {
+ case MDErrorReporter::MD_ERROR_KNOWN:
+
+ if (isset($_GET["output"]) and $_GET['output'] === "json") {
+ header('Content-type: application/json');
+ $output = [
+ "status" => "Error",
+ "msg" => $exception->getMessage(),
+ ];
+ echo MD_STD::json_encode($output);
+ exit;
+ }
+
+ echo $formatErrorPage($exception->getMessage(), "");
+ exit;
+
+ default:
+ $errorReporter->sendErrorReport($exception, "joshua@museum-digital.de");
+ echo $formatErrorPage("Uncaught exception ...
Our team has been notified and will get to fixing this error shortly.", "");
+ exit;
+ }
+
+}
+
/**
* Function lang_getfrombrowser gets the browser language based on HTTP headers.
*
@@ -101,7 +273,7 @@ function lang_getfrombrowser(array $allowed_languages, string $default_language,
*
* @return string
*/
-function printHTMLHead(string $injected = "") {
+function printHTMLHead(string $injected = ""):string {
$output = '
@@ -222,7 +394,7 @@ function getBlankRecordChannel():array {
*
* @return void
*/
-function rrmdir(string $dir) {
+function rrmdir(string $dir):void {
if (is_dir($dir)) {
$objects = scandir($dir);
foreach ($objects as $object) {