diff --git a/lib/WPStrava.php b/lib/WPStrava.php
index 754301a..91ef906 100644
--- a/lib/WPStrava.php
+++ b/lib/WPStrava.php
@@ -1,13 +1,43 @@
 <?php
-
+/*
+ * Main Strava plugin class.
+ */
 class WPStrava {
 
+	/**
+	 * Instance of this class (singleton).
+	 * @var WPStrava
+	 */
 	private static $instance = null;
-	private $settings        = null;
-	private $api             = array(); // Holds an array of APIs.
-	private $activity        = null;
-	private $routes          = null;
 
+	/**
+	 * Settings object to access settings.
+	 * @var WPStrava_Settings
+	 */
+	private $settings = null;
+
+	/**
+	 * Array of WPStrava_API objects (one for each athlete).
+	 *
+	 * @var array
+	 */
+	private $api = array();
+
+	/**
+	 * Activity object to get activities.
+	 * @var WPStrava_Activity
+	 */
+	private $activity = null;
+
+	/**
+	 * Route object to get routes.
+	 * @var WPStrava_Routes
+	 */
+	private $routes = null;
+
+	/**
+	 * Private constructor (singleton).
+	 */
 	private function __construct() {
 		$this->settings = new WPStrava_Settings();
 
@@ -23,6 +53,11 @@ class WPStrava {
 
 	}
 
+	/**
+	 * Get a singleton instance.
+	 *
+	 * @return WPStrava
+	 */
 	public static function get_instance() {
 		if ( ! self::$instance ) {
 			$class          = __CLASS__;
@@ -31,6 +66,12 @@ class WPStrava {
 		return self::$instance;
 	}
 
+	/**
+	 * Magic method to access activity, routes, settings, etc.
+	 *
+	 * @param string $name One of activity, routes, settings.
+	 * @return mixed|null
+	 */
 	public function __get( $name ) {
 		// On-demand classes.
 		if ( 'activity' === $name ) {
@@ -48,6 +89,12 @@ class WPStrava {
 		return null;
 	}
 
+	/**
+	 * Get an API object for the given athelete token.
+	 *
+	 * @param string $token Athlete token.
+	 * @return WPStrava_API
+	 */
 	public function get_api( $token = null ) {
 		if ( ! $token ) {
 			$token = $this->settings->get_default_token();
@@ -60,6 +107,11 @@ class WPStrava {
 		return $this->api[ $token ];
 	}
 
+	/**
+	 * Get the activity object.
+	 *
+	 * @return WPStrava_Activity
+	 */
 	public function get_activity() {
 		if ( ! $this->activity ) {
 			$this->activity = new WPStrava_Activity();
@@ -68,6 +120,11 @@ class WPStrava {
 		return $this->activity;
 	}
 
+	/**
+	 * Get the routes object.
+	 *
+	 * @return WPStrava_Routes
+	 */
 	public function get_routes() {
 		if ( ! $this->routes ) {
 			$this->routes = new WPStrava_Routes();
@@ -75,16 +132,25 @@ class WPStrava {
 		return $this->routes;
 	}
 
+	/**
+	 * Register the wp-strava stylesheet.
+	 */
 	public function register_scripts() {
 		// Register a personalized stylesheet.
 		wp_register_style( 'wp-strava-style', WPSTRAVA_PLUGIN_URL . 'css/wp-strava.css' );
 	}
 
+	/**
+	 * Register the widgets.
+	 */
 	public function register_widgets() {
 		register_widget( 'WPStrava_LatestActivitiesWidget' );
 		register_widget( 'WPStrava_LatestMapWidget' );
 	}
 
+	/**
+	 * Register the shortcodes.
+	 */
 	public function register_shortcodes() {
 		add_shortcode( 'ride', array( 'WPStrava_ActivityShortcode', 'handler' ) ); // @deprecated 1.1
 		add_shortcode( 'activity', array( 'WPStrava_ActivityShortcode', 'handler' ) );
diff --git a/lib/WPStrava/API.php b/lib/WPStrava/API.php
index 63fb753..4a1a6e9 100755
--- a/lib/WPStrava/API.php
+++ b/lib/WPStrava/API.php
@@ -38,7 +38,7 @@ class WPStrava_API {
 			if ( ! empty( $body->error ) ) {
 				$error = $body->error;
 			} else {
-				$error = print_r( $response, true ); // @codingStandardsIgnoreLine
+				$error = print_r( $response, true ); // phpcs:ignore -- Debug output.
 			}
 
 			return new WP_Error(
diff --git a/lib/WPStrava/ActivityShortcode.php b/lib/WPStrava/ActivityShortcode.php
index 8ceba13..e2b261b 100644
--- a/lib/WPStrava/ActivityShortcode.php
+++ b/lib/WPStrava/ActivityShortcode.php
@@ -29,7 +29,7 @@ class WPStrava_ActivityShortcode {
 
 		if ( is_wp_error( $activity_details ) ) {
 			if ( WPSTRAVA_DEBUG ) {
-				return '<pre>' . print_r( $activity_details, true ) . '</pre>'; // @codingStandardsIgnoreLine
+				return '<pre>' . print_r( $activity_details, true ) . '</pre>'; // phpcs:ignore -- Debug output.
 			} else {
 				return $activity_details->get_error_message();
 			}
diff --git a/lib/WPStrava/LatestMapWidget.php b/lib/WPStrava/LatestMapWidget.php
index 69bdbe7..a17009b 100644
--- a/lib/WPStrava/LatestMapWidget.php
+++ b/lib/WPStrava/LatestMapWidget.php
@@ -24,7 +24,10 @@ class WPStrava_LatestMapWidget extends WP_Widget {
 
 		?>
 		<p>
-			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:', 'wp-strava' ); ?></label>
+			<label for="<?php echo $this->get_field_id( 'title' ); ?>">
+				<?php // Translator: Widget Title. ?>
+				<?php esc_html_e( 'Title:', 'wp-strava' ); ?>
+			</label>
 			<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo $title; ?>" />
 		</p>
 		<p>
@@ -36,7 +39,10 @@ class WPStrava_LatestMapWidget extends WP_Widget {
 				</select>
 			</p>
 		<p>
-			<label for="<?php echo $this->get_field_id( 'distance_min' ); ?>"><?php echo sprintf( __( 'Min. Distance (%s):', 'wp-strava' ), $this->som->get_distance_label() ); ?></label>
+			<label for="<?php echo $this->get_field_id( 'distance_min' ); ?>">
+				<?php // Translators: Label for minimum distance input. ?>
+				<?php echo sprintf( __( 'Min. Distance (%s):', 'wp-strava' ), $this->som->get_distance_label() ); ?>
+			</label>
 			<input class="widefat" id="<?php echo $this->get_field_id( 'distance_min' ); ?>" name="<?php echo $this->get_field_name( 'distance_min' ); ?>" type="text" value="<?php echo $distance_min; ?>" />
 		</p>
 			<p>
@@ -128,6 +134,7 @@ class WPStrava_LatestMapWidget extends WP_Widget {
 			}
 
 			echo empty( $activity->map ) ?
+				// Translators: Text with activity name shown in place of image if not available.
 				sprintf( __( 'Map not available for activity "%s"', 'wp-strava' ), $activity->name ) :
 				"<a title='{$activity->name}' href='" . WPStrava_Activity::ACTIVITIES_URL . "{$activity->id}'>" .
 				$this->get_static_image( $id, $activity, $build_new ) .
diff --git a/lib/WPStrava/RouteShortcode.php b/lib/WPStrava/RouteShortcode.php
index cce6f9f..371f12d 100644
--- a/lib/WPStrava/RouteShortcode.php
+++ b/lib/WPStrava/RouteShortcode.php
@@ -35,7 +35,7 @@ class WPStrava_RouteShortcode {
 
 		if ( is_wp_error( $route_details ) ) {
 			if ( WPSTRAVA_DEBUG ) {
-				return '<pre>' . print_r( $route_details, true ) . '</pre>'; // @codingStandardsIgnoreLine
+				return '<pre>' . print_r( $route_details, true ) . '</pre>'; // phpcs:ignore -- Debug output.
 			} else {
 				return $route_details->get_error_message();
 			}
diff --git a/lib/WPStrava/Settings.php b/lib/WPStrava/Settings.php
index 4342ccc..c4c9a46 100644
--- a/lib/WPStrava/Settings.php
+++ b/lib/WPStrava/Settings.php
@@ -308,7 +308,7 @@ class WPStrava_Settings {
 				}
 			} else {
 				// Translators: error message from Strava
-				$this->feedback .= sprintf( __( 'There was an error receiving data from Strava: %s', 'wp-strava' ), print_r( $strava_info, true ) ); // @codingStandardsIgnoreLine
+				$this->feedback .= sprintf( __( 'There was an error receiving data from Strava: %s', 'wp-strava' ), print_r( $strava_info, true ) ); // phpcs:ignore -- Debug output.
 				return false;
 			}
 		} else {