bugfix: user preferences don't work correctly without output buffering

libraries/user_preferences.inc.php

@@ -47,17 +47,8 @@ if (!empty($_GET['saved'])) {
     $message->display();
 }
 
-$forms_all_keys = PMA_read_userprefs_fieldnames($forms);
-$cf = ConfigFile::getInstance();
-$cf->resetConfigData(); // start with a clean instance
-$cf->setAllowedKeys($forms_all_keys);
-$cf->setCfgUpdateReadMapping(array(
-    'Server/hide_db' => 'Servers/1/hide_db',
-    'Server/only_db' => 'Servers/1/only_db'));
-$cf->updateWithGlobalConfig($GLOBALS['cfg']);
-
 // todo: debug - remove
-$arr = $cf->getConfigArray();
+$arr = ConfigFile::getInstance()->getConfigArray();
 $arr2 = array();
 foreach ($arr as $k => $v) {
     $arr2[] = "<b>$k</b> " . var_export($v, true);

libraries/user_preferences.lib.php

@@ -6,6 +6,21 @@
  * @package phpMyAdmin
  */
 
+/**
+ * Common initialization for user preferences modification pages
+ */
+function PMA_userprefs_pageinit()
+{
+    $forms_all_keys = PMA_read_userprefs_fieldnames($GLOBALS['forms']);
+    $cf = ConfigFile::getInstance();
+    $cf->resetConfigData(); // start with a clean instance
+    $cf->setAllowedKeys($forms_all_keys);
+    $cf->setCfgUpdateReadMapping(array(
+        'Server/hide_db' => 'Servers/1/hide_db',
+        'Server/only_db' => 'Servers/1/only_db'));
+    $cf->updateWithGlobalConfig($GLOBALS['cfg']);
+}
+
 /**
  * Loads user preferences
  *

prefs_forms.php

@@ -18,11 +18,15 @@ require_once './libraries/config/Form.class.php';
 require_once './libraries/config/FormDisplay.class.php';
 require './libraries/config/user_preferences.forms.php';
 
-$GLOBALS['js_include'][] = 'config.js';
-require_once './libraries/header.inc.php';
-require_once './libraries/user_preferences.inc.php';
+PMA_userprefs_pageinit();
 
-// handle form display and processing
+// handle form processing
+
+$form_param = filter_input(INPUT_GET, 'form');
+if (!isset($forms[$form_param])) {
+    $forms_keys = array_keys($forms);
+    $form_param = array_shift($forms_keys);
+}
 
 $form_display = new FormDisplay();
 foreach ($forms[$form_param] as $form_name => $form) {
@@ -42,11 +46,25 @@ if (isset($_POST['revert'])) {
             . PMA_generate_common_url($url_params, '&'));
     exit;
 }
-if (!$form_display->process(false)) {
-    // handle form view and failed POST
-    $form_display->display(true, true);
+
+if ($form_display->process(false) && !$form_display->hasErrors()) {
+    // save settings
+    $old_settings = PMA_load_userprefs();
+    $result = PMA_save_userprefs(ConfigFile::getInstance()->getConfigArray());
+    if ($result === true) {
+        $hash = ltrim(filter_input(INPUT_POST, 'tab_hash'), '#');
+        PMA_userprefs_redirect($forms, $old_settings, 'prefs_forms.php', array(
+            'form' => $form_param), $hash);
+        exit;
     } else {
-    // check for form errors
+        $error = $result;
+    }
+}
+
+// display forms
+$GLOBALS['js_include'][] = 'config.js';
+require './libraries/header.inc.php';
+require './libraries/user_preferences.inc.php';
 if ($form_display->hasErrors()) {
     // form has errors
     ?>
@@ -55,22 +73,8 @@ if (!$form_display->process(false)) {
         <?php $form_display->displayErrors(); ?>
     </div>
     <?php
-        $form_display->display(true, true);
-    } else {
-        // save settings
-        $old_settings = PMA_load_userprefs();
-        $result = PMA_save_userprefs($cf->getConfigArray());
-        if ($result === true) {
-            $hash = ltrim(filter_input(INPUT_POST, 'tab_hash'), '#');
-            PMA_userprefs_redirect($forms, $old_settings, 'prefs_forms.php', array(
-                'form' => $form_param), $hash);
-            exit;
-        } else {
-            $result->display();
 }
 $form_display->display(true, true);
-    }
-}
 
 /**
  * Displays the footer

prefs_manage.php

@@ -18,6 +18,8 @@ require_once './libraries/config/Form.class.php';
 require_once './libraries/config/FormDisplay.class.php';
 require './libraries/config/user_preferences.forms.php';
 
+PMA_userprefs_pageinit();
+
 $error = '';
 if (isset($_POST['submit_export']) && filter_input(INPUT_POST, 'export_type') == 'text_file') {
     // export to JSON file
@@ -103,8 +105,8 @@ if (isset($_POST['submit_export']) && filter_input(INPUT_POST, 'export_type') ==
         }
         if (!$all_ok) {
             // mimic original form and post json in a hidden field
-            require_once './libraries/header.inc.php';
-            require_once './libraries/user_preferences.inc.php';
+            require './libraries/header.inc.php';
+            require './libraries/user_preferences.inc.php';
             $msg = PMA_Message::warning(__('Configuration contains incorrect data for some fields.'));
             $msg->display();
             echo '<div class="config-form">';
@@ -205,8 +207,8 @@ if (isset($_POST['submit_export']) && filter_input(INPUT_POST, 'export_type') ==
 }
 
 $GLOBALS['js_include'][] = 'config.js';
-require_once './libraries/header.inc.php';
-require_once './libraries/user_preferences.inc.php';
+require './libraries/header.inc.php';
+require './libraries/user_preferences.inc.php';
 ?>
 <script type="text/javascript">
 <?php