diff --git a/CRM/Dataprocessor/Upgrader/Base.php b/CRM/Dataprocessor/Upgrader/Base.php
index 6200bf838007fe4cab136452ab90c2d2ba56e56b..701c574e405d5ea6c1a6bc37fd8060a22e5268a0 100644
--- a/CRM/Dataprocessor/Upgrader/Base.php
+++ b/CRM/Dataprocessor/Upgrader/Base.php
@@ -9,9 +9,9 @@ use CRM_Dataprocessor_ExtensionUtil as E;
 class CRM_Dataprocessor_Upgrader_Base {
 
   /**
-   * @var varies, subclass of this
+   * @var CRM_Dataprocessor_Upgrader_Base
    */
-  static $instance;
+  public static $instance;
 
   /**
    * @var CRM_Queue_TaskContext
@@ -19,22 +19,25 @@ class CRM_Dataprocessor_Upgrader_Base {
   protected $ctx;
 
   /**
-   * @var string, eg 'com.example.myextension'
+   * @var string
+   *   eg 'com.example.myextension'
    */
   protected $extensionName;
 
   /**
-   * @var string, full path to the extension's source tree
+   * @var string
+   *   full path to the extension's source tree
    */
   protected $extensionDir;
 
   /**
-   * @var array(revisionNumber) sorted numerically
+   * @var revisionNumber[]
+   *   sorted numerically
    */
   private $revisions;
 
   /**
-   * @var boolean
+   * @var bool
    *   Flag to clean up extension revision data in civicrm_setting
    */
   private $revisionStorageIsDeprecated = FALSE;
@@ -42,7 +45,7 @@ class CRM_Dataprocessor_Upgrader_Base {
   /**
    * Obtain a reference to the active upgrade handler.
    */
-  static public function instance() {
+  public static function instance() {
     if (!self::$instance) {
       // FIXME auto-generate
       self::$instance = new CRM_Dataprocessor_Upgrader(
@@ -59,19 +62,25 @@ class CRM_Dataprocessor_Upgrader_Base {
    * Note: Each upgrader instance should only be associated with one
    * task-context; otherwise, this will be non-reentrant.
    *
-   * @code
+   * ```
    * CRM_Dataprocessor_Upgrader_Base::_queueAdapter($ctx, 'methodName', 'arg1', 'arg2');
-   * @endcode
+   * ```
    */
-  static public function _queueAdapter() {
+  public static function _queueAdapter() {
     $instance = self::instance();
     $args = func_get_args();
     $instance->ctx = array_shift($args);
     $instance->queue = $instance->ctx->queue;
     $method = array_shift($args);
-    return call_user_func_array(array($instance, $method), $args);
+    return call_user_func_array([$instance, $method], $args);
   }
 
+  /**
+   * CRM_Dataprocessor_Upgrader_Base constructor.
+   *
+   * @param $extensionName
+   * @param $extensionDir
+   */
   public function __construct($extensionName, $extensionDir) {
     $this->extensionName = $extensionName;
     $this->extensionDir = $extensionDir;
@@ -82,7 +91,8 @@ class CRM_Dataprocessor_Upgrader_Base {
   /**
    * Run a CustomData file.
    *
-   * @param string $relativePath the CustomData XML file path (relative to this extension's dir)
+   * @param string $relativePath
+   *   the CustomData XML file path (relative to this extension's dir)
    * @return bool
    */
   public function executeCustomDataFile($relativePath) {
@@ -93,11 +103,12 @@ class CRM_Dataprocessor_Upgrader_Base {
   /**
    * Run a CustomData file
    *
-   * @param string $xml_file  the CustomData XML file path (absolute path)
+   * @param string $xml_file
+   *   the CustomData XML file path (absolute path)
    *
    * @return bool
    */
-  protected static function executeCustomDataFileByAbsPath($xml_file) {
+  protected function executeCustomDataFileByAbsPath($xml_file) {
     $import = new CRM_Utils_Migrate_Import();
     $import->run($xml_file);
     return TRUE;
@@ -106,7 +117,8 @@ class CRM_Dataprocessor_Upgrader_Base {
   /**
    * Run a SQL file.
    *
-   * @param string $relativePath the SQL file path (relative to this extension's dir)
+   * @param string $relativePath
+   *   the SQL file path (relative to this extension's dir)
    *
    * @return bool
    */
@@ -119,10 +131,14 @@ class CRM_Dataprocessor_Upgrader_Base {
   }
 
   /**
+   * Run the sql commands in the specified file.
+   *
    * @param string $tplFile
    *   The SQL file path (relative to this extension's dir).
    *   Ex: "sql/mydata.mysql.tpl".
+   *
    * @return bool
+   * @throws \CRM_Core_Exception
    */
   public function executeSqlTemplate($tplFile) {
     // Assign multilingual variable to Smarty.
@@ -141,17 +157,19 @@ class CRM_Dataprocessor_Upgrader_Base {
    * Run one SQL query.
    *
    * This is just a wrapper for CRM_Core_DAO::executeSql, but it
-   * provides syntatic sugar for queueing several tasks that
+   * provides syntactic sugar for queueing several tasks that
    * run different queries
+   *
+   * @return bool
    */
-  public function executeSql($query, $params = array()) {
+  public function executeSql($query, $params = []) {
     // FIXME verify that we raise an exception on error
     CRM_Core_DAO::executeQuery($query, $params);
     return TRUE;
   }
 
   /**
-   * Syntatic sugar for enqueuing a task which calls a function in this class.
+   * Syntactic sugar for enqueuing a task which calls a function in this class.
    *
    * The task is weighted so that it is processed
    * as part of the currently-pending revision.
@@ -163,11 +181,11 @@ class CRM_Dataprocessor_Upgrader_Base {
     $args = func_get_args();
     $title = array_shift($args);
     $task = new CRM_Queue_Task(
-      array(get_class($this), '_queueAdapter'),
+      [get_class($this), '_queueAdapter'],
       $args,
       $title
     );
-    return $this->queue->createItem($task, array('weight' => -1));
+    return $this->queue->createItem($task, ['weight' => -1]);
   }
 
   // ******** Revision-tracking helpers ********
@@ -193,6 +211,8 @@ class CRM_Dataprocessor_Upgrader_Base {
 
   /**
    * Add any pending revisions to the queue.
+   *
+   * @param CRM_Queue_Queue $queue
    */
   public function enqueuePendingRevisions(CRM_Queue_Queue $queue) {
     $this->queue = $queue;
@@ -200,23 +220,23 @@ class CRM_Dataprocessor_Upgrader_Base {
     $currentRevision = $this->getCurrentRevision();
     foreach ($this->getRevisions() as $revision) {
       if ($revision > $currentRevision) {
-        $title = ts('Upgrade %1 to revision %2', array(
+        $title = E::ts('Upgrade %1 to revision %2', [
           1 => $this->extensionName,
           2 => $revision,
-        ));
+        ]);
 
         // note: don't use addTask() because it sets weight=-1
 
         $task = new CRM_Queue_Task(
-          array(get_class($this), '_queueAdapter'),
-          array('upgrade_' . $revision),
+          [get_class($this), '_queueAdapter'],
+          ['upgrade_' . $revision],
           $title
         );
         $this->queue->createItem($task);
 
         $task = new CRM_Queue_Task(
-          array(get_class($this), '_queueAdapter'),
-          array('setCurrentRevision', $revision),
+          [get_class($this), '_queueAdapter'],
+          ['setCurrentRevision', $revision],
           $title
         );
         $this->queue->createItem($task);
@@ -227,11 +247,12 @@ class CRM_Dataprocessor_Upgrader_Base {
   /**
    * Get a list of revisions.
    *
-   * @return array(revisionNumbers) sorted numerically
+   * @return array
+   *   revisionNumbers sorted numerically
    */
   public function getRevisions() {
     if (!is_array($this->revisions)) {
-      $this->revisions = array();
+      $this->revisions = [];
 
       $clazz = new ReflectionClass(get_class($this));
       $methods = $clazz->getMethods();
@@ -256,7 +277,7 @@ class CRM_Dataprocessor_Upgrader_Base {
 
   private function getCurrentRevisionDeprecated() {
     $key = $this->extensionName . ':version';
-    if ($revision = CRM_Core_BAO_Setting::getItem('Extension', $key)) {
+    if ($revision = \Civi::settings()->get($key)) {
       $this->revisionStorageIsDeprecated = TRUE;
     }
     return $revision;
@@ -302,7 +323,7 @@ class CRM_Dataprocessor_Upgrader_Base {
         $this->executeCustomDataFileByAbsPath($file);
       }
     }
-    if (is_callable(array($this, 'install'))) {
+    if (is_callable([$this, 'install'])) {
       $this->install();
     }
   }
@@ -315,7 +336,7 @@ class CRM_Dataprocessor_Upgrader_Base {
     if (!empty($revisions)) {
       $this->setCurrentRevision(max($revisions));
     }
-    if (is_callable(array($this, 'postInstall'))) {
+    if (is_callable([$this, 'postInstall'])) {
       $this->postInstall();
     }
   }
@@ -330,7 +351,7 @@ class CRM_Dataprocessor_Upgrader_Base {
         $this->executeSqlTemplate($file);
       }
     }
-    if (is_callable(array($this, 'uninstall'))) {
+    if (is_callable([$this, 'uninstall'])) {
       $this->uninstall();
     }
     $files = glob($this->extensionDir . '/sql/*_uninstall.sql');
@@ -346,7 +367,7 @@ class CRM_Dataprocessor_Upgrader_Base {
    */
   public function onEnable() {
     // stub for possible future use
-    if (is_callable(array($this, 'enable'))) {
+    if (is_callable([$this, 'enable'])) {
       $this->enable();
     }
   }
@@ -356,7 +377,7 @@ class CRM_Dataprocessor_Upgrader_Base {
    */
   public function onDisable() {
     // stub for possible future use
-    if (is_callable(array($this, 'disable'))) {
+    if (is_callable([$this, 'disable'])) {
       $this->disable();
     }
   }
@@ -364,7 +385,7 @@ class CRM_Dataprocessor_Upgrader_Base {
   public function onUpgrade($op, CRM_Queue_Queue $queue = NULL) {
     switch ($op) {
       case 'check':
-        return array($this->hasPendingRevisions());
+        return [$this->hasPendingRevisions()];
 
       case 'enqueue':
         return $this->enqueuePendingRevisions($queue);
diff --git a/CRM/Dataprocessor/Utils/Cache.php b/CRM/Dataprocessor/Utils/Cache.php
index cd6df72dc7bad7ecbb056db78e82b7d19c6f0c14..a001ef644208206aa06c45db05390740f8b2c2d0 100644
--- a/CRM/Dataprocessor/Utils/Cache.php
+++ b/CRM/Dataprocessor/Utils/Cache.php
@@ -53,7 +53,7 @@ class CRM_Dataprocessor_Utils_Cache {
    * @return mixed
    */
   public function get($key, $default=NULL) {
-    $environment = CRM_Core_BAO_Setting::getItem('', 'environment');
+    $environment = \Civi::settings()->get('environment');
     if ($environment == 'Production') {
       return $this->cache->get($key, $default);
     }
@@ -68,7 +68,7 @@ class CRM_Dataprocessor_Utils_Cache {
    * @return bool
    */
   public function set($key, $value, $ttl=NULL) {
-    $environment = CRM_Core_BAO_Setting::getItem('', 'environment');
+    $environment = \Civi::settings()->get('environment');
     if ($environment == 'Production') {
       return $this->cache->set($key, $value, $ttl);
     }
diff --git a/dataprocessor.civix.php b/dataprocessor.civix.php
index 950e7f5415c80ef17e43947ab242d6692791dccc..fdf3a61509159ab678160f2c4295e0954b08c840 100644
--- a/dataprocessor.civix.php
+++ b/dataprocessor.civix.php
@@ -193,8 +193,9 @@ function _dataprocessor_civix_civicrm_disable() {
  * @param $op string, the type of operation being performed; 'check' or 'enqueue'
  * @param $queue CRM_Queue_Queue, (for 'enqueue') the modifiable list of pending up upgrade tasks
  *
- * @return mixed  based on op. for 'check', returns array(boolean) (TRUE if upgrades are pending)
- *                for 'enqueue', returns void
+ * @return mixed
+ *   based on op. for 'check', returns array(boolean) (TRUE if upgrades are pending)
+ *   for 'enqueue', returns void
  *
  * @link https://docs.civicrm.org/dev/en/latest/hooks/hook_civicrm_upgrade
  */
@@ -225,7 +226,7 @@ function _dataprocessor_civix_upgrader() {
  * @param string $dir base dir
  * @param string $pattern , glob pattern, eg "*.txt"
  *
- * @return array(string)
+ * @return array
  */
 function _dataprocessor_civix_find_files($dir, $pattern) {
   if (is_callable(['CRM_Utils_File', 'findFiles'])) {
@@ -244,7 +245,7 @@ function _dataprocessor_civix_find_files($dir, $pattern) {
     if ($dh = opendir($subdir)) {
       while (FALSE !== ($entry = readdir($dh))) {
         $path = $subdir . DIRECTORY_SEPARATOR . $entry;
-        if ($entry{0} == '.') {
+        if ($entry[0] == '.') {
         }
         elseif (is_dir($path)) {
           $todos[] = $path;
@@ -255,6 +256,7 @@ function _dataprocessor_civix_find_files($dir, $pattern) {
   }
   return $result;
 }
+
 /**
  * (Delegated) Implements hook_civicrm_managed().
  *
@@ -362,7 +364,7 @@ function _dataprocessor_civix_civicrm_themes(&$themes) {
  * @link http://php.net/glob
  * @param string $pattern
  *
- * @return array, possibly empty
+ * @return array
  */
 function _dataprocessor_civix_glob($pattern) {
   $result = glob($pattern);
@@ -470,38 +472,32 @@ function _dataprocessor_civix_civicrm_alterSettingsFolders(&$metaDataFolders = N
  *
  * @link https://docs.civicrm.org/dev/en/latest/hooks/hook_civicrm_entityTypes
  */
-
 function _dataprocessor_civix_civicrm_entityTypes(&$entityTypes) {
-  $entityTypes = array_merge($entityTypes, array (
-    'CRM_Dataprocessor_DAO_DataProcessor' => 
-    array (
+  $entityTypes = array_merge($entityTypes, [
+    'CRM_Dataprocessor_DAO_DataProcessor' => [
       'name' => 'DataProcessor',
       'class' => 'CRM_Dataprocessor_DAO_DataProcessor',
       'table' => 'civicrm_data_processor',
-    ),
-    'CRM_Dataprocessor_DAO_DataProcessorField' => 
-    array (
+    ],
+    'CRM_Dataprocessor_DAO_DataProcessorField' => [
       'name' => 'DataProcessorField',
       'class' => 'CRM_Dataprocessor_DAO_DataProcessorField',
       'table' => 'civicrm_data_processor_field',
-    ),
-    'CRM_Dataprocessor_DAO_DataProcessorFilter' => 
-    array (
+    ],
+    'CRM_Dataprocessor_DAO_DataProcessorFilter' => [
       'name' => 'DataProcessorFilter',
       'class' => 'CRM_Dataprocessor_DAO_DataProcessorFilter',
       'table' => 'civicrm_data_processor_filter',
-    ),
-    'CRM_Dataprocessor_DAO_DataProcessorOutput' => 
-    array (
+    ],
+    'CRM_Dataprocessor_DAO_DataProcessorOutput' => [
       'name' => 'DataProcessorOutput',
       'class' => 'CRM_Dataprocessor_DAO_DataProcessorOutput',
       'table' => 'civicrm_data_processor_output',
-    ),
-    'CRM_Dataprocessor_DAO_DataProcessorSource' => 
-    array (
+    ],
+    'CRM_Dataprocessor_DAO_DataProcessorSource' => [
       'name' => 'DataProcessorSource',
       'class' => 'CRM_Dataprocessor_DAO_DataProcessorSource',
       'table' => 'civicrm_data_processor_source',
-    ),
-  ));
+    ],
+  ]);
 }