diff --git a/src/_h5ai/client/js/inc/main/info.js b/src/_h5ai/client/js/inc/main/info.js
index be8cd981..741b77ef 100644
--- a/src/_h5ai/client/js/inc/main/info.js
+++ b/src/_h5ai/client/js/inc/main/info.js
@@ -162,6 +162,12 @@ modulejs.define('main/info', ['$', 'config'], function ($, config) {
 
     function init() {
 
+        if (config.err === 'ERR_PHP') {
+            $(testsTemp).appendTo('#content');
+            addTest('PHP version', config.msg, false, config.ver);
+            return;
+        }
+
         addLogin();
         if (setup.AS_ADMIN) {
             addTests();
diff --git a/src/_h5ai/server/php/config.php b/src/_h5ai/server/php/config.php
new file mode 100644
index 00000000..bc7ad83a
--- /dev/null
+++ b/src/_h5ai/server/php/config.php
@@ -0,0 +1,8 @@
+<?php
+
+/*********************************************************************
+  SHA1 hash of the info page password, the preset password is the
+  empty string. You might change it to keep this information private.
+  Online hash generator: http://www.sha1.cz/
+*********************************************************************/
+define("PASSHASH", "da39a3ee5e6b4b0d3255bfef95601890afd80709");
diff --git a/src/_h5ai/server/php/inc/class-bootstrap.php b/src/_h5ai/server/php/inc/class-bootstrap.php
index dbc0341f..48f49237 100644
--- a/src/_h5ai/server/php/inc/class-bootstrap.php
+++ b/src/_h5ai/server/php/inc/class-bootstrap.php
@@ -19,7 +19,7 @@ class Bootstrap {
             $api->apply();
         } else {
             define("FALLBACK", $app->get_fallback());
-            normalized_require_once("page");
+            normalized_require_once("inc/page");
         }
     }
 
@@ -30,8 +30,6 @@ class Bootstrap {
         setlocale(LC_CTYPE, "en_US.UTF-8");
         date_default_timezone_set(@date_default_timezone_get());
 
-        define("MIN_PHP_VERSION", "5.4.0");
-        define("HAS_MIN_PHP_VERSION", version_compare(PHP_VERSION, MIN_PHP_VERSION) >= 0);
         define("HAS_PHP_EXIF", function_exists("exif_thumbnail"));
         $has_php_jpeg = false;
         if (function_exists("gd_info")) {
diff --git a/src/_h5ai/server/php/index.php b/src/_h5ai/server/php/index.php
index 3602c08d..ffce0994 100644
--- a/src/_h5ai/server/php/index.php
+++ b/src/_h5ai/server/php/index.php
@@ -1,24 +1,27 @@
 <?php
 
+define("MIN_PHP_VERSION", "5.4.0");
+define("HAS_MIN_PHP_VERSION", version_compare(PHP_VERSION, MIN_PHP_VERSION) >= 0);
 
-
-/*********************************************************************
-  SHA1 hash of the info page password, the preset password is the
-  empty string. You might change it to keep this information private.
-  Online hash generator: http://www.sha1.cz/
-*********************************************************************/
-define("PASSHASH", "da39a3ee5e6b4b0d3255bfef95601890afd80709");
-
-
+if (!HAS_MIN_PHP_VERSION) {
+    header("Content-type: application/json;charset=utf-8");
+    echo json_encode(array(
+        "err" => "ERR_PHP",
+        "msg" => "PHP " . MIN_PHP_VERSION . "+ required, only found " . PHP_VERSION,
+        "ver" => PHP_VERSION
+    ));
+    exit;
+}
 
 function normalized_require_once($lib) {
 
-    require_once(preg_replace("#[\\\\/]+#", "/", dirname(__FILE__) . "/inc/${lib}.php"));
+    require_once(preg_replace("#[\\\\/]+#", "/", dirname(__FILE__) . "/${lib}.php"));
 }
 
 function __autoload($class_name) {
 
-    normalized_require_once("class-" . strtolower($class_name));
+    normalized_require_once("inc/class-" . strtolower($class_name));
 }
 
+normalized_require_once("config");
 Bootstrap::run();