diff --git a/_admin.php b/_admin.php
index fb78a55..64b4915 100644
--- a/_admin.php
+++ b/_admin.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_CONTEXT_ADMIN')) {
     return null;
 }
@@ -43,7 +42,6 @@ dcCore::app()->addBehavior(
 );
 
 if (dcCore::app()->blog->settings->periodical->periodical_active) {
-
     dcCore::app()->menu[dcAdmin::MENU_PLUGINS]->addItem(
         __('Periodical'),
         dcCore::app()->adminurl->get('admin.plugin.periodical'),
@@ -94,14 +92,14 @@ dcCore::app()->addBehavior(
 class adminPeriodical
 {
     public static $combo_period = null;
-    protected static $per = null;
+    protected static $per       = null;
 
     public static function sortbyCombo()
     {
         return [
             __('Next update') => 'periodical_curdt',
             __('End date')    => 'periodical_enddt',
-            __('Frequence')   => 'periodical_pub_int'
+            __('Frequence')   => 'periodical_pub_int',
         ];
     }
 
@@ -110,19 +108,20 @@ class adminPeriodical
         if (self::$per === null) {
             self::$per = new periodical();
         }
+
         return self::$per;
     }
 
     /**
      * Add settings to blog preference
-     * 
+     *
      * @param  dcSettings   $blog_settings  dcSettings instance
      */
     public static function adminBlogPreferencesForm(dcSettings $blog_settings)
     {
-        $s_active = (boolean) $blog_settings->periodical->periodical_active;
-        $s_upddate = (boolean) $blog_settings->periodical->periodical_upddate;
-        $s_updurl = (boolean) $blog_settings->periodical->periodical_updurl;
+        $s_active  = (bool) $blog_settings->periodical->periodical_active;
+        $s_upddate = (bool) $blog_settings->periodical->periodical_upddate;
+        $s_updurl  = (bool) $blog_settings->periodical->periodical_updurl;
 
         echo
         '<div class="fieldset"><h4 id="periodical_params">' . __('Periodical') . '</h4>' .
@@ -147,7 +146,7 @@ class adminPeriodical
 
     /**
      * Save blog settings
-     * 
+     *
      * @param  dcSettings   $blog_settings  dcSettings instance
      */
     public static function adminBeforeBlogSettingsUpdate(dcSettings $blog_settings)
@@ -171,8 +170,8 @@ class adminPeriodical
                 'pub_int' => [true, __('Frequency')],
                 'pub_nb'  => [true, __('Entries per update')],
                 'nbposts' => [true, __('Entries')],
-                'enddt'   => [true, __('End date')]
-            ]
+                'enddt'   => [true, __('End date')],
+            ],
         ];
 
         $cols['posts'][1]['period'] = [true, __('Period')];
@@ -190,7 +189,7 @@ class adminPeriodical
             self::sortbyCombo(),
             'periodical_curdt',
             'desc',
-            [__('periods per page'), 10]
+            [__('periods per page'), 10],
         ];
     }
 
@@ -232,25 +231,26 @@ class adminPeriodical
     /**
      * Favorites.
      *
-     * @param   arrayObject $favs Array of favorites
+     * @param   dcFavorites $favs Array of favorites
      */
     public static function adminDashboardFavorites(dcFavorites $favs)
     {
         $favs->register('periodical', [
-            'title' => __('Periodical'),
-            'url' => 'plugin.php?p=periodical',
-            'small-icon' => 'index.php?pf=periodical/icon.png',
-            'large-icon' => 'index.php?pf=periodical/icon-big.png',
-            'permissions' => dcCore::app()->auth->check(dcCore::app()->auth->makePermissions([
+            'title'       => __('Periodical'),
+            'url'         => 'plugin.php?p=periodical',
+            'small-icon'  => 'index.php?pf=periodical/icon.png',
+            'large-icon'  => 'index.php?pf=periodical/icon-big.png',
+            'permissions' => dcCore::app()->auth->check(
+                dcCore::app()->auth->makePermissions([
                     dcAuth::PERMISSION_USAGE,
                     dcAuth::PERMISSION_CONTENT_ADMIN,
                 ]),
                 dcCore::app()->blog->id
             ),
             'active_cb' => [
-                'adminPeriodical', 
-                'adminDashboardFavoritesActive'
-            ]
+                'adminPeriodical',
+                'adminDashboardFavoritesActive',
+            ],
         ]);
     }
 
@@ -262,14 +262,14 @@ class adminPeriodical
      */
     public static function adminDashboardFavoritesActive($request, $params)
     {
-        return $request == 'plugin.php' 
-            && isset($params['p']) 
+        return $request == 'plugin.php'
+            && isset($params['p'])
             && $params['p'] == 'periodical';
     }
 
     /**
      * Add javascript for toggle
-     * 
+     *
      * @return string HTML head
      */
     public static function adminPostHeaders()
@@ -279,7 +279,7 @@ class adminPeriodical
 
     /**
      * Delete relation between post and period
-     * 
+     *
      * @param  integer $post_id Post id
      */
     public static function adminBeforePostDelete($post_id)
@@ -289,8 +289,8 @@ class adminPeriodical
 
     /**
      * Add actions to posts page combo
-     * 
-     * @param  dcPostsActions   $ap   dcPostsActions instance
+     *
+     * @param  dcPostsActions   $pa   dcPostsActions instance
      */
     public static function adminPostsActions(dcPostsActions $pa)
     {
@@ -313,7 +313,7 @@ class adminPeriodical
 
     /**
      * Posts actions callback to remove period
-     * 
+     *
      * @param  dcPostsActions   $pa   dcPostsActions instance
      * @param  ArrayObject        $post _POST actions
      */
@@ -327,14 +327,14 @@ class adminPeriodical
 
         # No right
         if (!dcCore::app()->auth->check(dcCore::app()->auth->makePermissions([
-                dcAuth::PERMISSION_DELETE,
-                dcAuth::PERMISSION_CONTENT_ADMIN,
-            ]), dcCore::app()->blog->id)) {
+            dcAuth::PERMISSION_DELETE,
+            dcAuth::PERMISSION_CONTENT_ADMIN,
+        ]), dcCore::app()->blog->id)) {
             throw new Exception(__('No enough right'));
         }
 
         # Remove linked period
-        foreach($posts_ids as $post_id) {
+        foreach ($posts_ids as $post_id) {
             self::delPeriod($post_id);
         }
 
@@ -344,7 +344,7 @@ class adminPeriodical
 
     /**
      * Posts actions callback to add period
-     * 
+     *
      * @param  dcPostsActions   $pa   dcPostsActions instance
      * @param  ArrayObject        $post _POST actions
      */
@@ -360,7 +360,7 @@ class adminPeriodical
 
         # Save action
         if (!empty($post['periodical'])) {
-            foreach($posts_ids as $post_id) {
+            foreach ($posts_ids as $post_id) {
                 self::delPeriod($post_id);
                 self::addPeriod($post_id, $post['periodical']);
             }
@@ -372,11 +372,11 @@ class adminPeriodical
         # Display form
         else {
             $pa->beginPage(
-                dcPage::breadcrumb(array(
+                dcPage::breadcrumb([
                     html::escapeHTML(dcCore::app()->blog->name) => '',
-                    $pa->getCallerTitle() => $pa->getRedirection(true),
-                    __('Add a period to this selection') => '' 
-                ))
+                    $pa->getCallerTitle()                       => $pa->getRedirection(true),
+                    __('Add a period to this selection')        => '',
+                ])
             );
 
             echo
@@ -385,7 +385,7 @@ class adminPeriodical
 
             self::formPeriod() .
 
-            '<p>'.
+            '<p>' .
             dcCore::app()->formNonce() .
             $pa->getHiddenFields() .
             form::hidden(['action'], 'periodical_add') .
@@ -398,7 +398,7 @@ class adminPeriodical
 
     /**
      * Add form to post sidebar
-     * 
+     *
      * @param  ArrayObject $main_items    Main items
      * @param  ArrayObject $sidebar_items Sidebar items
      * @param  record      $post          Post record or null
@@ -408,18 +408,17 @@ class adminPeriodical
         # Get existing linked period
         $period = '';
         if ($post) {
-            $rs = self::period()->getPosts(['post_id' => $post->post_id]);
+            $rs     = self::period()->getPosts(['post_id' => $post->post_id]);
             $period = $rs->isEmpty() ? '' : $rs->periodical_id;
         }
 
         # Set linked period form items
-        $sidebar_items['options-box']['items']['period'] =
-            self::formPeriod($period);
+        $sidebar_items['options-box']['items']['period'] = self::formPeriod($period);
     }
 
     /**
      * Save linked period
-     * 
+     *
      * @param  cursor  $cur     Current post cursor
      * @param  integer $post_id Post id
      */
@@ -438,11 +437,11 @@ class adminPeriodical
 
     /**
      * Posts period form field
-     * 
+     *
      * @param  string $period Period
-     * @return string         Period form content
+     * @return null|string         Period form content
      */
-    protected static function formPeriod($period='')
+    protected static function formPeriod($period = '')
     {
         $combo = self::comboPeriod();
 
@@ -450,7 +449,7 @@ class adminPeriodical
             return null;
         }
 
-        return 
+        return
         '<p><label for="periodical">' .
         __('Periodical') . '</label>' .
         form::combo('periodical', $combo, $period) .
@@ -459,23 +458,22 @@ class adminPeriodical
 
     /**
      * Combo of available periods
-     * 
+     *
      * @return array       List of period
      */
     protected static function comboPeriod()
     {
         if (adminPeriodical::$combo_period === null) {
-            $periods = self::period()->getPeriods();
+            $periods                       = self::period()->getPeriods();
+            adminPeriodical::$combo_period = [];
 
-            if ($periods->isEmpty()) {
-                adminPeriodical::$combo_period = [];
-            } else {
+            if (!$periods->isEmpty()) {
                 $combo = ['-' => ''];
                 while ($periods->fetch()) {
                     $combo[html::escapeHTML($periods->periodical_title)] = $periods->periodical_id;
                 }
+                adminPeriodical::$combo_period = $combo;
             }
-            adminPeriodical::$combo_period = $combo;
         }
 
         return adminPeriodical::$combo_period;
@@ -483,7 +481,7 @@ class adminPeriodical
 
     /**
      * Remove period from posts.
-     * 
+     *
      * @param  integer $post_id Post id
      */
     protected static function delPeriod($post_id)
@@ -492,13 +490,13 @@ class adminPeriodical
             return null;
         }
 
-        $post_id = (integer) $post_id;
+        $post_id = (int) $post_id;
         self::period()->delPost($post_id);
     }
 
     /**
      * Add period to posts
-     * 
+     *
      * @param  integer $post_id Post id
      * @param  array   $period  Period
      */
@@ -517,9 +515,9 @@ class adminPeriodical
             return null;
         }
 
-        $post_id = (integer) $post_id;
+        $post_id = (int) $post_id;
 
         # Add relation
         self::period()->addPost($period->periodical_id, $post_id);
     }
-}
\ No newline at end of file
+}
diff --git a/_define.php b/_define.php
index 3cf8417..115e6c3 100644
--- a/_define.php
+++ b/_define.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_RC_PATH')) {
     return null;
 }
@@ -27,12 +26,12 @@ $this->registerModule(
             dcAuth::PERMISSION_CONTENT_ADMIN,
         ]),
         'usage,contentadmin',
-        'type'        => 'plugin',
-        'support'     => 'https://github.com/JcDenis/periodical',
-        'details'     => 'https://plugins.dotaddict.org/dc2/details/periodical',
-        'repository'  => 'https://raw.githubusercontent.com/JcDenis/periodical/master/dcstore.xml',
-        'settings'    => [
-            'blog' => '#params.periodical_params'
-        ]
+        'type'       => 'plugin',
+        'support'    => 'https://github.com/JcDenis/periodical',
+        'details'    => 'https://plugins.dotaddict.org/dc2/details/periodical',
+        'repository' => 'https://raw.githubusercontent.com/JcDenis/periodical/master/dcstore.xml',
+        'settings'   => [
+            'blog' => '#params.periodical_params',
+        ],
     ]
-);
\ No newline at end of file
+);
diff --git a/_install.php b/_install.php
index a57f797..6524348 100644
--- a/_install.php
+++ b/_install.php
@@ -1,21 +1,20 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_CONTEXT_ADMIN')) {
     return null;
 }
 
-$dc_min = '2.24';
+$dc_min      = '2.24';
 $new_version = dcCore::app()->plugins->moduleInfo('periodical', 'version');
 $old_version = dcCore::app()->getVersion('periodical');
 
@@ -25,33 +24,35 @@ if (version_compare($old_version, $new_version, '>=')) {
 
 try {
     # Check Dotclear version
-    if (!method_exists('dcUtils', 'versionsCompare') 
+    if (!method_exists('dcUtils', 'versionsCompare')
         || dcUtils::versionsCompare(DC_VERSION, $dc_min, '<', false)
     ) {
         throw new Exception(sprintf(
-            '%s requires Dotclear %s', 'periodical', $dc_min
+            '%s requires Dotclear %s',
+            'periodical',
+            $dc_min
         ));
     }
 
     # Tables
-    $t = new dbStruct(dcCore::app()->con,dcCore::app()->prefix);
+    $t = new dbStruct(dcCore::app()->con, dcCore::app()->prefix);
 
     # Table principale des sondages
     $t->periodical
-        ->periodical_id ('bigint', 0, false)
+        ->periodical_id('bigint', 0, false)
         ->blog_id('varchar', 32, false)
-        ->periodical_type ('varchar', 32, false, "'post'")
-        ->periodical_title ('varchar', 255, false, "''")
-        ->periodical_tz ('varchar', 128, false, "'UTC'")
-        ->periodical_curdt ('timestamp', 0, false,' now()')
-        ->periodical_enddt ('timestamp', 0, false, 'now()')
-        ->periodical_pub_int ('varchar', 32, false, "'day'")
-        ->periodical_pub_nb ('smallint', 0, false, 1)
+        ->periodical_type('varchar', 32, false, "'post'")
+        ->periodical_title('varchar', 255, false, "''")
+        ->periodical_tz('varchar', 128, false, "'UTC'")
+        ->periodical_curdt('timestamp', 0, false, ' now()')
+        ->periodical_enddt('timestamp', 0, false, 'now()')
+        ->periodical_pub_int('varchar', 32, false, "'day'")
+        ->periodical_pub_nb('smallint', 0, false, 1)
 
         ->primary('pk_periodical', 'periodical_id')
         ->index('idx_periodical_type', 'btree', 'periodical_type');
 
-    $ti = new dbStruct(dcCore::app()->con, dcCore::app()->prefix);
+    $ti      = new dbStruct(dcCore::app()->con, dcCore::app()->prefix);
     $changes = $ti->synchronize($t);
 
     # Settings
@@ -70,4 +71,4 @@ try {
     dcCore::app()->error->add($e->getMessage());
 }
 
-return false;
\ No newline at end of file
+return false;
diff --git a/_prepend.php b/_prepend.php
index 43a3de5..db30048 100644
--- a/_prepend.php
+++ b/_prepend.php
@@ -1,21 +1,20 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_RC_PATH')) {
     return null;
 }
 
 # DB class
-Clearbricks::lib()->autoload(['periodical'          => __DIR__ . '/inc/class.periodical.php']);
+Clearbricks::lib()->autoload(['periodical' => __DIR__ . '/inc/class.periodical.php']);
 # Admin list and pagers
-Clearbricks::lib()->autoload(['adminPeriodicalList' => __DIR__ . '/inc/lib.index.pager.php']);
\ No newline at end of file
+Clearbricks::lib()->autoload(['adminPeriodicalList' => __DIR__ . '/inc/lib.index.pager.php']);
diff --git a/_public.php b/_public.php
index ff8dd2d..2db10e2 100644
--- a/_public.php
+++ b/_public.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_RC_PATH')) {
     return null;
 }
@@ -19,7 +18,7 @@ if (!in_array(dcCore::app()->url->type, ['default', 'feed'])) {
     return null;
 }
 
-dcCore::app()->blog->settings->addNamespace('periodical'); 
+dcCore::app()->blog->settings->addNamespace('periodical');
 
 dcCore::app()->addBehavior(
     'publicBeforeDocumentV2',
@@ -35,18 +34,17 @@ class publicPeriodical
 {
     /**
      * Publish periodical
-     * 
      */
     public static function publicBeforeDocument()
     {
         try {
             $per = new periodical();
-            $s = dcCore::app()->blog->settings->periodical;
+            $s   = dcCore::app()->blog->settings->periodical;
 
             $per->lockUpdate();
 
             # Get periods
-            $periods =  dcCore::app()->auth->sudo([$per, 'getPeriods']);
+            $periods = dcCore::app()->auth->sudo([$per, 'getPeriods']);
 
             # No period
             if ($periods->isEmpty()) {
@@ -55,14 +53,14 @@ class publicPeriodical
                 return null;
             }
 
-            $now = dt::toUTC(time());
+            $now         = dt::toUTC(time());
             $posts_order = $s->periodical_pub_order;
             if (!preg_match('/^(post_dt|post_creadt|post_id) (asc|desc)$/', $posts_order)) {
                 $posts_order = 'post_dt asc';
             }
             $cur_period = dcCore::app()->con->openCursor(dcCore::app()->prefix . 'periodical');
 
-            while($periods->fetch()) {
+            while ($periods->fetch()) {
                 # Check if period is ongoing
                 $cur_tz = strtotime($periods->periodical_curdt);
                 $end_tz = strtotime($periods->periodical_enddt);
@@ -77,9 +75,10 @@ class publicPeriodical
 
                     # Calculate nb of posts to get
                     $loop_tz = $cur_tz;
-                    $limit = 0;
+                    $limit   = 0;
+
                     try {
-                        while(1) {
+                        while (1) {
                             if ($loop_tz > $max_tz) {
                                 break;
                             }
@@ -92,18 +91,18 @@ class publicPeriodical
                     # If period need update
                     if ($limit > 0) {
                         # Get posts to publish related to this period
-                        $posts_params = [];
+                        $posts_params                  = [];
                         $posts_params['periodical_id'] = $periods->periodical_id;
                         $posts_params['post_status']   = '-2';
                         $posts_params['order']         = $posts_order;
                         $posts_params['limit']         = $limit * $max_nb;
                         $posts_params['no_content']    = true;
-                        $posts = dcCore::app()->auth->sudo([$per, 'getPosts'], $posts_params);
+                        $posts                         = dcCore::app()->auth->sudo([$per, 'getPosts'], $posts_params);
 
                         if (!$posts->isEmpty()) {
                             $cur_post = dcCore::app()->con->openCursor(dcCore::app()->prefix . 'post');
 
-                            while($posts->fetch()) {
+                            while ($posts->fetch()) {
                                 # Publish post with right date
                                 $cur_post->clean();
                                 $cur_post->post_status = 1;
@@ -139,7 +138,6 @@ class publicPeriodical
 
                                 # --BEHAVIOR-- periodicalAfterPublishedPeriodicalEntry
                                 dcCore::app()->callBehavior('periodicalAfterPublishedPeriodicalEntry', $posts, $periods);
-
                             }
                             dcCore::app()->blog->triggerBlog();
                         }
@@ -156,9 +154,11 @@ class publicPeriodical
             }
             $per->unlockUpdate();
         } catch (Exception $e) {
-            $per->unlockUpdate();
+            if (isset($per)) {
+                $per->unlockUpdate();
+            }
 
             return null;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/inc/class.periodical.php b/inc/class.periodical.php
index caf80f2..71192f7 100644
--- a/inc/class.periodical.php
+++ b/inc/class.periodical.php
@@ -1,17 +1,16 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
-if (!defined('DC_RC_PATH')){
+if (!defined('DC_RC_PATH')) {
     return;
 }
 
@@ -28,7 +27,7 @@ class periodical
         $this->con = dcCore::app()->con;
 
         $this->table = dcCore::app()->con->escape(dcCore::app()->prefix . 'periodical');
-        $this->blog = dcCore::app()->con->escape(dcCore::app()->blog->id);
+        $this->blog  = dcCore::app()->con->escape(dcCore::app()->blog->id);
     }
 
     public function openCursor()
@@ -47,8 +46,7 @@ class periodical
             if (!empty($params['columns']) && is_array($params['columns'])) {
                 $q .= implode(', ', $params['columns']) . ', ';
             }
-            $q .= 
-            'T.periodical_title, T.periodical_tz, ' .
+            $q .= 'T.periodical_title, T.periodical_tz, ' .
             'T.periodical_curdt, T.periodical_enddt, ' .
             'T.periodical_pub_int, T.periodical_pub_nb ';
         }
@@ -73,7 +71,7 @@ class periodical
             if (is_array($params['periodical_id'])) {
                 array_walk($params['periodical_id'], create_function('&$v,$k', 'if($v!==null){$v=(integer)$v;}'));
             } else {
-                $params['periodical_id'] = [(integer) $params['periodical_id']];
+                $params['periodical_id'] = [(int) $params['periodical_id']];
             }
             $q .= 'AND T.periodical_id ' . $this->con->in($params['periodical_id']);
         }
@@ -81,11 +79,11 @@ class periodical
             $q .= "AND T.periodical_title = '" . $this->con->escape($params['periodical_title']) . "' ";
         }
         if (!empty($params['sql'])) {
-            $q .= $params['sql'].' ';
+            $q .= $params['sql'] . ' ';
         }
         if (!$count_only) {
             if (!empty($params['order'])) {
-                $q .= 'ORDER BY ' . $this->con->escape($params['order']).' ';
+                $q .= 'ORDER BY ' . $this->con->escape($params['order']) . ' ';
             } else {
                 $q .= 'ORDER BY T.periodical_id ASC ';
             }
@@ -109,42 +107,44 @@ class periodical
                 'SELECT MAX(periodical_id) FROM ' . $this->table
             )->f(0) + 1;
 
-            $cur->periodical_id = $id;
-            $cur->blog_id = $this->blog;
+            $cur->periodical_id   = $id;
+            $cur->blog_id         = $this->blog;
             $cur->periodical_type = 'post';
-            $cur->periodical_tz = dcCore::app()->auth->getInfo('user_tz');
+            $cur->periodical_tz   = dcCore::app()->auth->getInfo('user_tz');
             $cur->insert();
             $this->con->unlock();
         } catch (Exception $e) {
             $this->con->unlock();
+
             throw $e;
         }
+
         return $cur->periodical_id;
     }
 
-    public function updPeriod($period_id,$cur)
+    public function updPeriod($period_id, $cur)
     {
-        $period_id = (integer) $period_id;
+        $period_id = (int) $period_id;
 
-        if ($cur->periodical_tz == '' 
+        if ($cur->periodical_tz == ''
         && ($cur->periodical_curdt != '' || $cur->periodical_enddt != '')) {
             $cur->periodical_tz = dcCore::app()->auth->getInfo('user_tz');
         }
         $cur->update(
             "WHERE blog_id = '" . $this->blog . "' " .
-            "AND periodical_id = " . $period_id . " "
+            'AND periodical_id = ' . $period_id . ' '
         );
     }
 
     # Delete a period
     public function delPeriod($period_id)
     {
-        $period_id = (integer) $period_id;
+        $period_id = (int) $period_id;
 
-        $params = [];
+        $params                  = [];
         $params['periodical_id'] = $period_id;
-        $params['post_status'] = '';
-        $rs = $this->getPosts($params);
+        $params['post_status']   = '';
+        $rs                      = $this->getPosts($params);
 
         if (!$rs->isEmpty()) {
             throw new Exception('Periodical is not empty');
@@ -153,16 +153,16 @@ class periodical
         $this->con->execute(
             'DELETE FROM ' . $this->table . ' ' .
             "WHERE blog_id = '" . $this->blog . "' " .
-            "AND periodical_id = " . $period_id . " "
+            'AND periodical_id = ' . $period_id . ' '
         );
     }
 
     # Remove all posts related to a period
     public function delPeriodPosts($period_id)
     {
-        $params = [];
-        $params['post_status'] = '';
-        $params['periodical_id'] = (integer) $period_id;
+        $params                  = [];
+        $params['post_status']   = '';
+        $params['periodical_id'] = (int) $period_id;
 
         $rs = $this->getPosts($params);
 
@@ -170,9 +170,8 @@ class periodical
             return;
         }
 
-        $ids = array();
-        while($rs->fetch())
-        {
+        $ids = [];
+        while ($rs->fetch()) {
             $ids[] = $rs->post_id;
         }
 
@@ -183,7 +182,7 @@ class periodical
         $this->con->execute(
             'DELETE FROM ' . dcCore::app()->prefix . 'meta ' .
             "WHERE meta_type = 'periodical' " .
-            "AND post_id " . $this->con->in($ids)
+            'AND post_id ' . $this->con->in($ids)
         );
     }
 
@@ -220,9 +219,9 @@ class periodical
 
         if (!empty($params['periodical_id'])) {
             if (is_array($params['periodical_id'])) {
-                array_walk($params['periodical_id'], function ($v) { if ($v !== null) { $v = (integer) $v; } });
+                array_walk($params['periodical_id'], function ($v) { if ($v !== null) { $v = (int) $v; } });
             } else {
-                $params['periodical_id'] = [(integer) $params['periodical_id']];
+                $params['periodical_id'] = [(int) $params['periodical_id']];
             }
             $params['sql'] .= 'AND T.periodical_id ' . $this->con->in($params['periodical_id']);
             unset($params['periodical_id']);
@@ -230,7 +229,7 @@ class periodical
         if (dcCore::app()->auth->check('admin', dcCore::app()->blog->id)) {
             if (isset($params['post_status'])) {
                 if ($params['post_status'] != '') {
-                    $params['sql'] .= 'AND P.post_status = ' . (integer) $params['post_status'] . ' ';
+                    $params['sql'] .= 'AND P.post_status = ' . (int) $params['post_status'] . ' ';
                 }
                 unset($params['post_status']);
             }
@@ -238,7 +237,7 @@ class periodical
             $params['sql'] .= 'AND P.post_status = -2 ';
         }
 
-        $rs = dcCore::app()->blog->getPosts($params, $count_only);
+        $rs             = dcCore::app()->blog->getPosts($params, $count_only);
         $rs->periodical = $this;
 
         return $rs;
@@ -247,26 +246,27 @@ class periodical
     # Add post to periodical
     public function addPost($period_id, $post_id)
     {
-        $period_id = (integer) $period_id;
-        $post_id = (integer) $post_id;
+        $period_id = (int) $period_id;
+        $post_id   = (int) $post_id;
 
         # Check if exists
-        $rs = $this->getPosts(array('post_id' => $post_id, 'periodical_id' => $period_id));
+        $rs = $this->getPosts(['post_id' => $post_id, 'periodical_id' => $period_id]);
         if (!$rs->isEmpty()) {
             return;
         }
 
-        $cur = $this->con->openCursor(dcCore::app()->prefix  .'meta');
+        $cur = $this->con->openCursor(dcCore::app()->prefix . 'meta');
         $this->con->writeLock(dcCore::app()->prefix . 'meta');
 
         try {
-            $cur->post_id = $post_id;
-            $cur->meta_id = $period_id;
+            $cur->post_id   = $post_id;
+            $cur->meta_id   = $period_id;
             $cur->meta_type = 'periodical';
             $cur->insert();
             $this->con->unlock();
         } catch (Exception $e) {
             $this->con->unlock();
+
             throw $e;
         }
     }
@@ -274,24 +274,25 @@ class periodical
     # Delete post from periodical
     public function delPost($post_id)
     {
-        $post_id = (integer) $post_id;
+        $post_id = (int) $post_id;
 
         $this->con->execute(
             'DELETE FROM ' . dcCore::app()->prefix . 'meta ' .
             "WHERE meta_type = 'periodical' " .
             "AND post_id = '" . $post_id . "' "
         );
+
         return true;
     }
 
     # Remove all posts without pending status from periodical
     public function cleanPosts($period_id = null)
     {
-        $params = [];
+        $params                = [];
         $params['post_status'] = '';
-        $params['sql'] = 'AND post_status != -2 ';
+        $params['sql']         = 'AND post_status != -2 ';
         if ($period_id !== null) {
-            $params['periodical_id'] = (integer) $period_id;
+            $params['periodical_id'] = (int) $period_id;
         }
         $rs = $this->getPosts($params);
 
@@ -299,8 +300,8 @@ class periodical
             return;
         }
 
-        $ids = array();
-        while($rs->fetch()) {
+        $ids = [];
+        while ($rs->fetch()) {
             $ids[] = $rs->post_id;
         }
 
@@ -311,7 +312,7 @@ class periodical
         $this->con->execute(
             'DELETE FROM ' . dcCore::app()->prefix . 'meta ' .
             "WHERE meta_type = 'periodical' " .
-            "AND post_id " . $this->con->in($ids)
+            'AND post_id ' . $this->con->in($ids)
         );
     }
 
@@ -322,41 +323,48 @@ class periodical
             __('twice a day') => 'halfday',
             __('Daily')       => 'day',
             __('Weekly')      => 'week',
-            __('Monthly')     => 'month'
+            __('Monthly')     => 'month',
         ];
     }
 
     public static function getNextTime($ts, $period)
     {
-        $ts = (integer) $ts;
-        $e = explode(',', date('H,i,s,n,j,Y', $ts));
-        switch($period)
-        {
+        $ts = (int) $ts;
+        $e  = explode(',', date('H,i,s,n,j,Y', $ts));
+        switch($period) {
             case 'hour':
                 $new_ts = mktime($e[0] + 1, $e[1], $e[2], $e[3], $e[4], $e[5]);
-            break;
+
+                break;
 
             case 'halfday':
                 $new_ts = mktime($e[0] + 12, $e[1], $e[2], $e[3], $e[4], $e[5]);
-            break;
+
+                break;
 
             case 'day':
-                $new_ts = mktime($e[0], $e[1] ,$e[2], $e[3], $e[4] + 1, $e[5]);
-            break;
+                $new_ts = mktime($e[0], $e[1], $e[2], $e[3], $e[4] + 1, $e[5]);
+
+                break;
 
             case 'week':
                 $new_ts = mktime($e[0], $e[1], $e[2], $e[3], $e[4] + 7, $e[5]);
-            break;
+
+                break;
 
             case 'month':
                 $new_ts = mktime($e[0], $e[1], $e[2], $e[3] + 1, $e[4], $e[5]);
-            break;
+
+                break;
 
             default:
                 $new_ts = 0;
+
                 throw new Exception(__('Unknow frequence'));
-            break;
+
+                break;
         }
+
         return $new_ts;
     }
 
@@ -366,14 +374,14 @@ class periodical
         try {
             # Need flock function
             if (!function_exists('flock')) {
-                throw New Exception("Can't call php function named flock");
+                throw new Exception("Can't call php function named flock");
             }
             # Cache writable ?
             if (!is_writable(DC_TPL_CACHE)) {
                 throw new Exception("Can't write in cache fodler");
             }
             # Set file path
-            $f_md5 = md5($this->blog);
+            $f_md5       = md5($this->blog);
             $cached_file = sprintf(
                 '%s/%s/%s/%s/%s.txt',
                 DC_TPL_CACHE,
@@ -386,30 +394,32 @@ class periodical
             $cached_file = path::real($cached_file, false);
             # Make dir
             if (!is_dir(dirname($cached_file))) {
-                    files::makeDir(dirname($cached_file), true);
+                files::makeDir(dirname($cached_file), true);
             }
             # Make file
             if (!file_exists($cached_file)) {
                 !$fp = @fopen($cached_file, 'w');
                 if ($fp === false) {
-                    throw New Exception("Can't create file");
+                    throw new Exception("Can't create file");
                 }
                 fwrite($fp, '1', strlen('1'));
                 fclose($fp);
             }
             # Open file
             if (!($fp = @fopen($cached_file, 'r+'))) {
-                throw New Exception("Can't open file");
+                throw new Exception("Can't open file");
             }
             # Lock file
             if (!flock($fp, LOCK_EX)) {
-                throw New Exception("Can't lock file");
+                throw new Exception("Can't lock file");
             }
             $this->lock = $fp;
+
             return true;
         } catch (Exception $e) {
             throw $e;
         }
+
         return false;
     }
 
@@ -418,4 +428,4 @@ class periodical
         @fclose($this->lock);
         $this->lock = null;
     }
-}
\ No newline at end of file
+}
diff --git a/inc/index.period.php b/inc/index.period.php
index 02b4405..cb00293 100644
--- a/inc/index.period.php
+++ b/inc/index.period.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_CONTEXT_ADMIN')) {
     return null;
 }
@@ -21,24 +20,24 @@ dcPage::check(dcCore::app()->auth->makePermissions([dcAuth::PERMISSION_USAGE, dc
 $per = new periodical();
 
 # Default values
-$action = isset($_POST['action']) ? $_POST['action'] : '';
+$action = $_POST['action'] ?? '';
 
 $starting_script = '';
 
 # Default value for period
-$period_id      = null;
-$period_title   = __('One post per day');
-$period_pub_nb  = 1;
-$period_pub_int = 'day';
-$period_curdt   = date('Y-m-d H:i', time());
-$period_enddt   = date('Y-m-d H:i', time() + 31536000); //one year
+$period_id        = null;
+$period_title     = __('One post per day');
+$period_pub_nb    = 1;
+$period_pub_int   = 'day';
+$period_curdt     = date('Y-m-d H:i', time());
+$period_enddt     = date('Y-m-d H:i', time() + 31536000); //one year
 $bad_period_curdt = false;
 $bad_period_enddt = false;
 
 # Get period
 if (!empty($_REQUEST['period_id'])) {
     $rs = $per->getPeriods([
-        'periodical_id' => $_REQUEST['period_id']
+        'periodical_id' => $_REQUEST['period_id'],
     ]);
     if ($rs->isEmpty()) {
         dcCore::app()->error->add(__('This period does not exist.'));
@@ -60,9 +59,9 @@ if ($action == 'setperiod') {
         $period_title = $_POST['period_title'];
     }
     if (!empty($_POST['period_pub_nb'])) {
-        $period_pub_nb = abs((integer) $_POST['period_pub_nb']);
+        $period_pub_nb = abs((int) $_POST['period_pub_nb']);
     }
-    if (!empty($_POST['period_pub_int']) 
+    if (!empty($_POST['period_pub_int'])
         && in_array($_POST['period_pub_int'], $per->getTimesCombo())
     ) {
         $period_pub_int = $_POST['period_pub_int'];
@@ -96,10 +95,10 @@ if ($action == 'setperiod') {
 
     # Check period title and dates
     $old_titles = $per->getPeriods([
-        'periodical_title' => $period_title
+        'periodical_title' => $period_title,
     ]);
     if (!$old_titles->isEmpty()) {
-        while($old_titles->fetch()) {
+        while ($old_titles->fetch()) {
             if (!$period_id || $old_titles->periodical_id != $period_id) {
                 dcCore::app()->error->add(__('Period title is already taken'));
             }
@@ -114,7 +113,7 @@ if ($action == 'setperiod') {
 
     # If no error, set period
     if (!dcCore::app()->error->flag()) {
-        $cur = $per->openCursor();
+        $cur                     = $per->openCursor();
         $cur->periodical_title   = $period_title;
         $cur->periodical_curdt   = $period_curdt;
         $cur->periodical_enddt   = $period_enddt;
@@ -150,8 +149,8 @@ if (!dcCore::app()->error->flag() && $period_id && $action && !empty($_POST['per
     # Publish posts
     if ($action == 'publish') {
         try {
-            foreach($_POST['periodical_entries'] as $id) {
-                $id = (integer) $id;
+            foreach ($_POST['periodical_entries'] as $id) {
+                $id = (int) $id;
                 dcCore::app()->blog->updPostStatus($id, 1);
                 $per->delPost($id);
             }
@@ -173,9 +172,9 @@ if (!dcCore::app()->error->flag() && $period_id && $action && !empty($_POST['per
     # Unpublish posts
     if ($action == 'unpublish') {
         try {
-            foreach($_POST['periodical_entries'] as $id) {
-                $id = (integer) $id;
-                dcCore::app()->blog->updPostStatus($id,0);
+            foreach ($_POST['periodical_entries'] as $id) {
+                $id = (int) $id;
+                dcCore::app()->blog->updPostStatus($id, 0);
                 $per->delPost($id);
             }
 
@@ -196,8 +195,8 @@ if (!dcCore::app()->error->flag() && $period_id && $action && !empty($_POST['per
     # Remove posts from periodical
     if ($action == 'remove_post_periodical') {
         try {
-            foreach($_POST['periodical_entries'] as $id) {
-                $id = (integer) $id;
+            foreach ($_POST['periodical_entries'] as $id) {
+                $id = (int) $id;
                 $per->delPost($id);
             }
 
@@ -222,22 +221,21 @@ if ($period_id) {
     $post_filter = new adminPostFilter();
     $post_filter->add('part', 'period');
 
-    $params = $post_filter->params();
+    $params                  = $post_filter->params();
     $params['periodical_id'] = $period_id;
     $params['no_content']    = true;
 
     # Get posts
     try {
-        $posts = $per->getPosts($params);
-        $counter = $per->getPosts($params, true);
+        $posts     = $per->getPosts($params);
+        $counter   = $per->getPosts($params, true);
         $post_list = new adminPeriodicalList(dcCore::app(), $posts, $counter->f(0));
     } catch (Exception $e) {
         dcCore::app()->error->add($e->getMessage());
     }
 
-    $starting_script =
-        dcPage::jsLoad(dcPage::getPF('periodical/js/checkbox.js')) .
-        $post_filter->js(dcCore::app()->adminurl->get('admin.plugin.periodical', ['part' => 'period', 'period_id' => $period_id], '&').'#posts');
+    $starting_script = dcPage::jsLoad(dcPage::getPF('periodical/js/checkbox.js')) .
+        $post_filter->js(dcCore::app()->adminurl->get('admin.plugin.periodical', ['part' => 'period', 'period_id' => $period_id], '&') . '#posts');
 }
 
 # Display
@@ -252,9 +250,9 @@ dcPage::jsPageTabs() .
 
 echo
 dcPage::breadcrumb([
-        __('Plugins') => '',
-        __('Periodical') => dcCore::app()->admin->getPageURL() . '&amp;part=periods',
-        (null === $period_id ? __('New period') : __('Edit period')) => ''
+    __('Plugins')                                                => '',
+    __('Periodical')                                             => dcCore::app()->admin->getPageURL() . '&amp;part=periods',
+    (null === $period_id ? __('New period') : __('Edit period')) => '',
 ]) .
 dcPage::notices();
 
@@ -278,12 +276,12 @@ form::datetime('period_curdt', [
 form::datetime('period_enddt', [
     'default' => html::escapeHTML(dt::str('%Y-%m-%dT%H:%M', strtotime($period_enddt))),
     'class'   => ($bad_period_enddt ? 'invalid' : ''),
-]) .'</p>
+]) . '</p>
 
 </div><div class="two-boxes">
 
 <p><label for="period_pub_int">' . __('Publication frequency:') . '</label>' .
-form::combo('period_pub_int',$per->getTimesCombo(), $period_pub_int) . '</p>
+form::combo('period_pub_int', $per->getTimesCombo(), $period_pub_int) . '</p>
 
 <p><label for="period_pub_nb">' . __('Number of entries to publish every time:') . '</label>' .
 form::number('period_pub_nb', ['min' => 1, 'max' => 20, 'default' => $period_pub_nb]) . '</p>
@@ -295,22 +293,21 @@ form::number('period_pub_nb', ['min' => 1, 'max' => 20, 'default' => $period_pub
 dcCore::app()->formNonce() .
 form::hidden(['action'], 'setperiod') .
 form::hidden(['period_id'], $period_id) .
-form::hidden(['part'], 'period') .'
+form::hidden(['part'], 'period') . '
 </p>
 </div>
 </form>
 </div>';
 
-if ($period_id && !dcCore::app()->error->flag()) {
-
+if ($period_id && isset($post_filter) && isset($post_list) && !dcCore::app()->error->flag()) {
     # Actions combo box
-    $combo_action = [];
-    $combo_action[__('Entries')][__('Publish')] = 'publish';
-    $combo_action[__('Entries')][__('Unpublish')] = 'unpublish';
+    $combo_action                                                 = [];
+    $combo_action[__('Entries')][__('Publish')]                   = 'publish';
+    $combo_action[__('Entries')][__('Unpublish')]                 = 'unpublish';
     $combo_action[__('Periodical')][__('Remove from periodical')] = 'remove_post_periodical';
 
     $base_url = dcCore::app()->admin->getPageURL() .
-        '&amp;period_id=' .$period_id .
+        '&amp;period_id=' . $period_id .
         '&amp;part=period' .
         '&amp;user_id=' . $post_filter->user_id .
         '&amp;cat_id=' . $post_filter->cat_id .
@@ -329,15 +326,18 @@ if ($period_id && !dcCore::app()->error->flag()) {
     <div id="posts"><h3>' . __('Entries linked to this period') . '</h3>';
 
     # Filters
-    $post_filter->display(['admin.plugin.periodical', '#posts'], 
+    $post_filter->display(
+        ['admin.plugin.periodical', '#posts'],
         dcCore::app()->adminurl->getHiddenFormFields('admin.plugin.periodical', [
             'period_id' => $period_id,
-            'part'      => 'period'
+            'part'      => 'period',
         ])
     );
 
     # Posts list
-    $post_list->postDisplay($post_filter, $base_url, 
+    $post_list->postDisplay(
+        $post_filter,
+        $base_url,
         '<form action="' . dcCore::app()->admin->getPageURL() . '" method="post" id="form-entries">' .
 
         '%s' .
@@ -350,7 +350,7 @@ if ($period_id && !dcCore::app()->error->flag()) {
         '<input type="submit" value="' . __('ok') . '" /></p>' .
         dcCore::app()->adminurl->getHiddenFormFields('admin.plugin.periodical', array_merge($post_filter->values(), [
             'period_id' => $period_id,
-            'redir'     => sprintf($base_url, $post_filter->page)
+            'redir'     => sprintf($base_url, $post_filter->page),
         ])) .
         dcCore::app()->formNonce() .
         '</div>' .
@@ -363,4 +363,4 @@ if ($period_id && !dcCore::app()->error->flag()) {
 
 dcPage::helpBlock('periodical');
 
-echo '</body></html>';
\ No newline at end of file
+echo '</body></html>';
diff --git a/inc/index.periods.php b/inc/index.periods.php
index 27d943e..af45c18 100644
--- a/inc/index.periods.php
+++ b/inc/index.periods.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_CONTEXT_ADMIN')) {
     return null;
 }
@@ -21,13 +20,13 @@ dcPage::check(dcCore::app()->auth->makePermissions([dcAuth::PERMISSION_USAGE, dc
 $per = new periodical();
 
 # Default values
-$action = isset($_POST['action']) ? $_POST['action'] : '';
+$action = $_POST['action'] ?? '';
 
 # Delete periods and related posts links
 if ($action == 'deleteperiods' && !empty($_POST['periods'])) {
     try {
-        foreach($_POST['periods'] as $id) {
-            $id = (integer) $id;
+        foreach ($_POST['periods'] as $id) {
+            $id = (int) $id;
             $per->delPeriodPosts($id);
             $per->delPeriod($id);
         }
@@ -48,8 +47,8 @@ if ($action == 'deleteperiods' && !empty($_POST['periods'])) {
 # Delete periods related posts links (without delete periods)
 if ($action == 'emptyperiods' && !empty($_POST['periods'])) {
     try {
-        foreach($_POST['periods'] as $id) {
-            $id = (integer) $id;
+        foreach ($_POST['periods'] as $id) {
+            $id = (int) $id;
             $per->delPeriodPosts($id);
         }
 
@@ -69,7 +68,7 @@ if ($action == 'emptyperiods' && !empty($_POST['periods'])) {
 
 $combo_action = [
     __('empty periods')  => 'emptyperiods',
-    __('delete periods') => 'deleteperiods'
+    __('delete periods') => 'deleteperiods',
 ];
 
 # Filters
@@ -80,15 +79,15 @@ $params = $p_filter->params();
 
 # Get periods
 try {
-    $periods = $per->getPeriods($params);
-    $counter = $per->getPeriods($params, true);
+    $periods     = $per->getPeriods($params);
+    $counter     = $per->getPeriods($params, true);
     $period_list = new adminPeriodicalList(dcCore::app(), $periods, $counter->f(0));
 } catch (Exception $e) {
     dcCore::app()->error->add($e->getMessage());
 }
 
 # Display
-echo 
+echo
 '<html><head><title>' . __('Periodical') . '</title>' .
 dcPage::jsLoad(dcPage::getPF('periodical/js/checkbox.js')) .
 $p_filter->js(dcCore::app()->adminurl->get('admin.plugin.periodical', ['part' => 'periods'])) .
@@ -96,8 +95,8 @@ $p_filter->js(dcCore::app()->adminurl->get('admin.plugin.periodical', ['part' =>
 '<body>' .
 
 dcPage::breadcrumb([
-        __('Plugins') => '',
-        __('Periodical') => ''
+    __('Plugins')    => '',
+    __('Periodical') => '',
 ]) .
 dcPage::notices() .
 
@@ -105,27 +104,29 @@ dcPage::notices() .
 <a class="button add" href="' . dcCore::app()->admin->getPageURL() . '&amp;part=period">' . __('New period') . '</a>
 </p>';
 
-# Filters
-$p_filter->display('admin.plugin.periodical', form::hidden('p', 'periodical') . form::hidden('part', 'periods'));
+if (isset($period_list)) {
+    # Filters
+    $p_filter->display('admin.plugin.periodical', form::hidden('p', 'periodical') . form::hidden('part', 'periods'));
 
-# Periods list
-$period_list->periodDisplay($p_filter,
-    '<form action="' . dcCore::app()->admin->getPageURL() . '" method="post" id="form-periods">' .
+    # Periods list
+    $period_list->periodDisplay(
+        $p_filter,
+        '<form action="' . dcCore::app()->admin->getPageURL() . '" method="post" id="form-periods">' .
 
-    '%s' .
+        '%s' .
 
-    '<div class="two-cols">' .
-    '<p class="col checkboxes-helpers"></p>' .
-
-    '<p class="col right">' . __('Selected periods action:') . ' ' .
-    form::combo('action', $combo_action) .
-    '<input type="submit" value="' . __('ok') . '" /></p>' .
-    dcCore::app()->adminurl->getHiddenFormFields('admin.plugin.periodical', array_merge(['p' =>  'periodical'], $p_filter->values(true))) . 
-    dcCore::app()->formNonce() .
-    '</div>' .
-    '</form>'
-);
+        '<div class="two-cols">' .
+        '<p class="col checkboxes-helpers"></p>' .
 
+        '<p class="col right">' . __('Selected periods action:') . ' ' .
+        form::combo('action', $combo_action) .
+        '<input type="submit" value="' . __('ok') . '" /></p>' .
+        dcCore::app()->adminurl->getHiddenFormFields('admin.plugin.periodical', array_merge(['p' => 'periodical'], $p_filter->values(true))) .
+        dcCore::app()->formNonce() .
+        '</div>' .
+        '</form>'
+    );
+}
 dcPage::helpBlock('periodical');
 
-echo '</body></html>';
\ No newline at end of file
+echo '</body></html>';
diff --git a/inc/lib.index.pager.php b/inc/lib.index.pager.php
index 1426290..ae3f7b3 100644
--- a/inc/lib.index.pager.php
+++ b/inc/lib.index.pager.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_CONTEXT_ADMIN')) {
     return null;
 }
@@ -24,7 +23,7 @@ class adminPeriodicalList extends adminGenericList
 {
     private $periodical = null;
 
-    public function periodDisplay($filter, $enclose_block='')
+    public function periodDisplay($filter, $enclose_block = '')
     {
         if ($this->rs->isEmpty()) {
             if ($filter->show()) {
@@ -34,20 +33,21 @@ class adminPeriodicalList extends adminGenericList
             }
         } else {
             $this->periodical = new periodical();
-            $pager = new dcPager((int) $filter->page, $this->rs_count, $filter->nb, 10);
-            $pager->var_page = 'page';
+            $pager            = new dcPager((int) $filter->page, $this->rs_count, $filter->nb, 10);
+            $pager->var_page  = 'page';
 
             $periods = [];
             if (isset($_REQUEST['periods'])) {
                 foreach ($_REQUEST['periods'] as $v) {
-                    $periods[(integer) $v] = true;
+                    $periods[(int) $v] = true;
                 }
             }
 
-            $html_block = '<div class="table-outer"><table><caption>' . ($filter->show() ? 
+            $html_block = '<div class="table-outer"><table><caption>' . (
+                $filter->show() ?
                 sprintf(__('List of %s periods matching the filter.'), $this->rs_count) :
                 sprintf(__('List of %s periods.'), $this->rs_count)
-            ). '</caption>';
+            ) . '</caption>';
 
             $cols = new ArrayObject([
                 'name'    => '<th colspan="2" class="first">' . __('Name') . '</th>',
@@ -55,7 +55,7 @@ class adminPeriodicalList extends adminGenericList
                 'pub_int' => '<th scope="col" class="nowrap">' . __('Frequency') . '</th>',
                 'pub_nb'  => '<th scope="col" class="nowrap">' . __('Entries per update') . '</th>',
                 'nbposts' => '<th scope="col" class="nowrap">' . __('Entries') . '</th>',
-                'enddt'   => '<th scope="col" class="nowrap">' . __('End date') . '</th>'
+                'enddt'   => '<th scope="col" class="nowrap">' . __('End date') . '</th>',
             ]);
 
             $this->userColumns('periodical', $cols);
@@ -79,36 +79,36 @@ class adminPeriodicalList extends adminGenericList
     private function periodLine($checked)
     {
         $nb_posts = $this->periodical->getPosts(['periodical_id' => $this->rs->periodical_id], true)->f(0);
-        $url = dcCore::app()->adminurl->get('admin.plugin.periodical', ['part' => 'period', 'period_id' => $this->rs->periodical_id]);
+        $url      = dcCore::app()->adminurl->get('admin.plugin.periodical', ['part' => 'period', 'period_id' => $this->rs->periodical_id]);
 
         $name = '<a href="' . $url . '#period" title="' . __('edit period') . '">' . html::escapeHTML($this->rs->periodical_title) . '</a>';
 
-        $posts = $nb_posts ?  
+        $posts = $nb_posts ?
             '<a href="' . $url . '#posts" title="' . __('view related entries') . '">' . $nb_posts . '</a>' :
             '0';
 
-        $interval = in_array($this->rs->periodical_pub_int, $this->periodical->getTimesCombo()) ? 
+        $interval = in_array($this->rs->periodical_pub_int, $this->periodical->getTimesCombo()) ?
             __(array_search($this->rs->periodical_pub_int, $this->periodical->getTimesCombo())) : __('Unknow frequence');
 
         $cols = new ArrayObject([
-            'check'   => '<td class="nowrap">' . form::checkbox(['periods[]'], $this->rs->periodical_id, ['checked'  => $checked]) . '</td>',
+            'check'   => '<td class="nowrap">' . form::checkbox(['periods[]'], $this->rs->periodical_id, ['checked' => $checked]) . '</td>',
             'name'    => '<td class="maximal">' . $name . '</td>',
             'curdt'   => '<td class="nowrap count">' . dt::dt2str(__('%Y-%m-%d %H:%M'), $this->rs->periodical_curdt) . '</td>',
             'pub_int' => '<td class="nowrap">' . $interval . '</td>',
             'pub_nb'  => '<td class="nowrap count">' . $this->rs->periodical_pub_nb . '</td>',
-            'nbposts' => '<td class="nowrap count">' . $posts. '</td>',
-            'enddt'   => '<td class="nowrap count">' . dt::dt2str(__('%Y-%m-%d %H:%M'), $this->rs->periodical_enddt) . '</td>'
+            'nbposts' => '<td class="nowrap count">' . $posts . '</td>',
+            'enddt'   => '<td class="nowrap count">' . dt::dt2str(__('%Y-%m-%d %H:%M'), $this->rs->periodical_enddt) . '</td>',
         ]);
 
         $this->userColumns('periodical', $cols);
 
-        return 
+        return
             '<tr class="line ' . ($nb_posts ? '' : ' offline') . '" id="p' . $this->rs->periodical_id . '">' .
-            implode(iterator_to_array($cols)) . 
+            implode(iterator_to_array($cols)) .
             '</tr>';
     }
 
-    public function postDisplay($filter, $base_url, $enclose_block='')
+    public function postDisplay($filter, $base_url, $enclose_block = '')
     {
         $echo = '';
         if ($this->rs->isEmpty()) {
@@ -118,14 +118,14 @@ class adminPeriodicalList extends adminGenericList
                 echo '<p><strong>' . __('No entry') . '</strong></p>';
             }
         } else {
-            $pager = new dcPager($filter->page, $this->rs_count, $filter->nb, 10);
+            $pager           = new dcPager($filter->page, $this->rs_count, $filter->nb, 10);
             $pager->base_url = $base_url;
             $pager->var_page = 'page';
 
             $periodical_entries = [];
             if (isset($_REQUEST['periodical_entries'])) {
                 foreach ($_REQUEST['periodical_entries'] as $v) {
-                    $periodical_entries[(integer) $v] = true;
+                    $periodical_entries[(int) $v] = true;
                 }
             }
 
@@ -135,14 +135,14 @@ class adminPeriodicalList extends adminGenericList
                 'category' => '<th scope="col">' . __('Category') . '</th>',
                 'author'   => '<th scope="col">' . __('Author') . '</th>',
                 'status'   => '<th scope="col">' . __('Status') . '</th>',
-                'create'   => '<th scope="col" class="nowrap">' . __('Create date') . '</th>'
+                'create'   => '<th scope="col" class="nowrap">' . __('Create date') . '</th>',
             ];
 
-            $html_block =
-            '<div class="table-outer"><table><caption>' . ($filter->show() ? 
+            $html_block = '<div class="table-outer"><table><caption>' . (
+                $filter->show() ?
                 sprintf(__('List of %s entries matching the filter.'), $this->rs_count) :
                 sprintf(__('List of %s entries.'), $this->rs_count)
-            ). '</caption><tr>' . implode($cols) . '</tr>%s</table>%s</div>';
+            ) . '</caption><tr>' . implode($cols) . '</tr>%s</table>%s</div>';
 
             if ($enclose_block) {
                 $html_block = sprintf($enclose_block, $html_block);
@@ -188,24 +188,28 @@ class adminPeriodicalList extends adminGenericList
             $cat_title = __('None');
         }
 
-        $img = '<img alt="%1$s" title="%1$s" src="images/%2$s" />';
-        switch ($this->rs->post_status)
-        {
+        $img_status = '';
+        $img        = '<img alt="%1$s" title="%1$s" src="images/%2$s" />';
+        switch ($this->rs->post_status) {
             case 1:
                 $img_status = sprintf($img, __('published'), 'check-on.png');
-            break;
+
+                break;
 
             case 0:
                 $img_status = sprintf($img, __('unpublished'), 'check-off.png');
-            break;
+
+                break;
 
             case -1:
                 $img_status = sprintf($img, __('scheduled'), 'scheduled.png');
-            break;
+
+                break;
 
             case -2:
                 $img_status = sprintf($img, __('pending'), 'check-wrn.png');
-            break;
+
+                break;
         }
 
         $protected = '';
@@ -218,24 +222,25 @@ class adminPeriodicalList extends adminGenericList
             $selected = sprintf($img, __('selected'), 'selected.png');
         }
 
-        $attach = '';
+        $attach   = '';
         $nb_media = $this->rs->countMedia();
         if ($nb_media > 0) {
             $attach_str = $nb_media == 1 ? __('%d attachment') : __('%d attachments');
-            $attach = sprintf($img, sprintf($attach_str, $nb_media), 'attach.png');
+            $attach     = sprintf($img, sprintf($attach_str, $nb_media), 'attach.png');
         }
 
         $cols = [
-            'check'    => '<td class="minimal">' . form::checkbox(['periodical_entries[]'], $this->rs->post_id, ['checked'  => $checked]) . '</td>',
-            'title'    => '<td class="maximal"><a href="' . $this->rs->core->getPostAdminURL($this->rs->post_type, $this->rs->post_id) . '" ' .
+            'check' => '<td class="minimal">' . form::checkbox(['periodical_entries[]'], $this->rs->post_id, ['checked' => $checked]) . '</td>',
+            'title' => '<td class="maximal"><a href="' . dcCore::app()->getPostAdminURL($this->rs->post_type, $this->rs->post_id) . '" ' .
                 'title="' . html::escapeHTML($this->rs->getURL()) . '">' . html::escapeHTML($this->rs->post_title) . '</a></td>',
             'date'     => '<td class="nowrap">' . dt::dt2str(__('%Y-%m-%d %H:%M'), $this->rs->post_dt) . '</td>',
             'category' => '<td class="nowrap">' . $cat_title . '</td>',
             'author'   => '<td class="nowrap">' . $this->rs->user_id . '</td>',
             'status'   => '<td class="nowrap status">' . $img_status . ' ' . $selected . ' ' . $protected . ' ' . $attach . '</td>',
-            'create'   => '<td class="nowrap">' . dt::dt2str(__('%Y-%m-%d %H:%M'), $this->rs->post_creadt, $this->rs->core->auth->getInfo('user_tz')) . '</td>'
+            'create'   => '<td class="nowrap">' . dt::dt2str(__('%Y-%m-%d %H:%M'), $this->rs->post_creadt, dcCore::app()->auth->getInfo('user_tz')) . '</td>',
         ];
 
-        return '<tr class="line">' . implode($cols) . '</tr>';;
+        return '<tr class="line">' . implode($cols) . '</tr>';
+        ;
     }
-}
\ No newline at end of file
+}
diff --git a/index.php b/index.php
index 4963ded..40dd39f 100644
--- a/index.php
+++ b/index.php
@@ -1,16 +1,15 @@
 <?php
 /**
  * @brief periodical, a plugin for Dotclear 2
- * 
+ *
  * @package Dotclear
  * @subpackage Plugin
- * 
+ *
  * @author Jean-Christian Denis and contributors
- * 
+ *
  * @copyright Jean-Christian Denis
  * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
  */
-
 if (!defined('DC_CONTEXT_ADMIN')) {
     return null;
 }
@@ -21,4 +20,4 @@ if ($part == 'period') {
     include __DIR__ . '/inc/index.period.php';
 } else {
     include __DIR__ . '/inc/index.periods.php';
-}
\ No newline at end of file
+}
diff --git a/locales/en/resources.php b/locales/en/resources.php
index f61f0bd..22d6045 100644
--- a/locales/en/resources.php
+++ b/locales/en/resources.php
@@ -1,10 +1,11 @@
 <?php
+
 # -- BEGIN LICENSE BLOCK ----------------------------------
 #
 # This file is part of periodical, a plugin for Dotclear 2.
-# 
+#
 # Copyright (c) 2009-2021 Jean-Christian Denis and contributors
-# 
+#
 # Licensed under the GPL version 2.0 license.
 # A copy of this license is available in LICENSE file or at
 # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
@@ -15,4 +16,4 @@ if (!defined('DC_RC_PATH')) {
     return null;
 }
 
-dcCore::app()->resources['help']['periodical'] = __DIR__ . '/help/help.html';
\ No newline at end of file
+dcCore::app()->resources['help']['periodical'] = __DIR__ . '/help/help.html';
diff --git a/locales/fr/resources.php b/locales/fr/resources.php
index f61f0bd..22d6045 100644
--- a/locales/fr/resources.php
+++ b/locales/fr/resources.php
@@ -1,10 +1,11 @@
 <?php
+
 # -- BEGIN LICENSE BLOCK ----------------------------------
 #
 # This file is part of periodical, a plugin for Dotclear 2.
-# 
+#
 # Copyright (c) 2009-2021 Jean-Christian Denis and contributors
-# 
+#
 # Licensed under the GPL version 2.0 license.
 # A copy of this license is available in LICENSE file or at
 # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
@@ -15,4 +16,4 @@ if (!defined('DC_RC_PATH')) {
     return null;
 }
 
-dcCore::app()->resources['help']['periodical'] = __DIR__ . '/help/help.html';
\ No newline at end of file
+dcCore::app()->resources['help']['periodical'] = __DIR__ . '/help/help.html';