+function getoutput($blocks = [])
+{
+ $rep = [];
+ foreach ($blocks as $name => $html) {
+ $rep["[[$name]]"] = sprintf('<!--BLOCK:%s-->%s<!--/-->',
+ is_numeric($name) ? '' : "[[$name]]",
+ preg_replace('{<!--[^-]*-->}', '', $html)
+ );
+ }
+ return str_replace(array_keys($rep), array_values($rep), ob_get_clean());
+}
+
+# custom error handling
+
+define('DOCROOT', getcwd().'/');
+
+function fail($error)
+{
+ http_response_code(500);
+ include_once 'page.inc.php';
+ ob_start();
+ require_once DOCROOT.'500.html';
+ print getoutput(['debug' => $error]);
+}
+
+set_exception_handler('fail');
+
+define('E_FATAL', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);
+
+set_error_handler(function ($level, $error, $file, $line) {
+ if ($level & E_FATAL) {
+ fail($error);
+ return;
+ }
+ return FALSE;
+});
+
+register_shutdown_function(function () {
+ # display failure page for fatal exceptions
+ $error = error_get_last();
+ if (!($error['type'] & E_FATAL)) return;
+ fail("Fatal: $error[message] in $error[file]:$error[line]");
+});
+
+error_reporting(error_reporting() & ~E_FATAL);
+
+# user login and control
+
+include_once 'auth.inc.php';
+$Edit = isset($_GET['edit']);
+
+# distinguish subpage Args from topmost Page script
+