Fix PHP warnings

main/admin/user_add.php

@@ -235,7 +235,14 @@ $form->addGroup($group, 'mail', get_lang('SendMailToNewUser'), ' ');
 $form->addElement('radio', 'radio_expiration_date', get_lang('ExpirationDate'), get_lang('NeverExpires'), 0);
 $group = array ();
 $group[] = $form->createElement('radio', 'radio_expiration_date', null, get_lang('On'), 1);
-$group[] = $form->createElement('DatePicker', 'expiration_date', null, array('form_name' => $form->getAttribute('name'), 'onchange' => 'javascript: enable_expiration_date();'));
+$group[] = $form->createElement(
+    'DatePicker',
+    'expiration_date',
+    null,
+    array(
+        'onchange' => 'javascript: enable_expiration_date();'
+    )
+);
 $form->addGroup($group, 'max_member_group', null, '', false);
 // Active account or inactive account
 $form->addElement('radio', 'active', get_lang('ActiveAccount'), get_lang('Active'), 1);
@@ -258,12 +265,9 @@ $defaults['admin']['platform_admin'] = 0;
 $defaults['mail']['send_mail'] = 1;
 $defaults['password']['password_auto'] = 1;
 $defaults['active'] = 1;
-$defaults['expiration_date'] = array();
 $days = api_get_setting('account_valid_duration');
-$time = strtotime('+'.$days.' day');
-$defaults['expiration_date']['d'] = date('d', $time);
-$defaults['expiration_date']['F'] = date('m', $time);
-$defaults['expiration_date']['Y'] = date('Y', $time);
+$defaults['expiration_date'] = date('Y-m-d', api_strtotime('+'.$days.' day'));
+
 $defaults['radio_expiration_date'] = 0;
 $defaults['status'] = STUDENT;
 $defaults = array_merge($defaults, $extra_data);
@@ -352,7 +356,25 @@ if( $form->validate()) {
 		} else {
  			if (!empty($picture['name'])) {
 				$picture_uri = UserManager::update_user_picture($user_id, $_FILES['picture']['name'], $_FILES['picture']['tmp_name']);
-				UserManager::update_user($user_id, $firstname, $lastname, $username, $password, $auth_source, $email, $status, $official_code, $phone, $picture_uri, $expiration_date, $active, null, $hr_dept_id, null, $language);
+                UserManager::update_user(
+                    $user_id,
+                    $firstname,
+                    $lastname,
+                    $username,
+                    $password,
+                    $auth_source,
+                    $email,
+                    $status,
+                    $official_code,
+                    $phone,
+                    $picture_uri,
+                    $expiration_date,
+                    $active,
+                    null,
+                    $hr_dept_id,
+                    null,
+                    $language
+                );
 			}
 
 			foreach ($extra as $key => $value) {

main/attendance/attendance_calendar.php

@@ -38,12 +38,12 @@ if (!empty($message_information)) {
     Display::display_normal_message($message, false);
 }
 
-if ($error_repeat_date) {
+if (isset($error_repeat_date) && $error_repeat_date) {
     $message = get_lang('EndDateMustBeMoreThanStartDate');
     Display::display_error_message($message, false);
 }
 
-if ($error_checkdate) {
+if (isset($error_checkdate) && $error_checkdate) {
     $message = get_lang('InvalidDate');
     Display::display_error_message($message, false);
 }
@@ -70,13 +70,14 @@ if (isset($action) && $action == 'calendar_add') {
         )
     );
 
-    $defaults['repeat'] = $repeat;
+    $defaults['repeat'] = isset($repeat) ? $repeat : null;
 
-    if ($repeat) {
+    if ($defaults['repeat']) {
         $form->addElement('html', '<div id="repeat-date-attendance" style="display:block">');
     } else {
         $form->addElement('html', '<div id="repeat-date-attendance" style="display:none">');
     }
+
     $a_repeat_type = array(
         'daily' => get_lang('RepeatDaily'),
         'weekly' => get_lang('RepeatWeekly'),

main/attendance/attendance_list.php

@@ -30,6 +30,8 @@ if ($attendance->get_number_of_attendances() == 0) {
     $attendance->set_description(get_lang('Attendances'));
     $attendance->attendance_add();
 }
+$default_column = isset($default_column) ? $default_column : null;
+$parameters = isset($parameters) ? $parameters : null;
 $table = new SortableTable(
     'attendance_list',
     array('Attendance', 'get_number_of_attendances'),