diff --git a/src/admin/class-wysiwyg.php b/src/admin/class-wysiwyg.php
index ad3e572..9495d1a 100644
--- a/src/admin/class-wysiwyg.php
+++ b/src/admin/class-wysiwyg.php
@@ -25,16 +25,6 @@ use footnotes\includes as Includes;
  */
 class WYSIWYG {
 
-	/**
-	 * The ID of this plugin.
-	 *
-	 * @access  private
-	 * @var  string  $plugin_name  The ID of this plugin.
-	 *
-	 * @since  2.8.0
-	 */
-	private $plugin_name;
-
 	/**
 	 * Initialize the class and set its properties.
 	 *
@@ -42,10 +32,8 @@ class WYSIWYG {
 	 *
 	 * @since  2.8.0
 	 */
-	public function __construct( $plugin_name ) {
-
-		$this->plugin_name = $plugin_name;
-
+	public function __construct()
+	{
 	}
 
 	/**
diff --git a/src/admin/layout/class-engine.php b/src/admin/layout/class-engine.php
index 534da19..5e1d543 100644
--- a/src/admin/layout/class-engine.php
+++ b/src/admin/layout/class-engine.php
@@ -47,7 +47,7 @@ abstract class Engine {
 	 *
 	 * @since  1.5.0
 	 */
-	protected $a_str_sub_page_hook = null;
+	protected $a_str_sub_page_hook;
 
 	/**
 	 * Stores all Sections for the child sub-page.
@@ -286,7 +286,6 @@ abstract class Engine {
 		echo '<h2 class="nav-tab-wrapper">';
 		// Iterate through all register sections.
 		foreach ( $this->a_arr_sections as $l_str_id => $l_arr_description ) {
-			$l_str_tab_active = ( $l_str_id === $l_arr_active_section['id'] ) ? ' nav-tab-active' : '';
 			echo sprintf(
 				'<a class="nav-tab%s" href="?page=%s&t=%s">%s</a>',
 				( $l_str_id === $l_arr_active_section['id'] ) ? ' nav-tab-active' : '',
diff --git a/src/includes/class-convert.php b/src/includes/class-convert.php
index 2ceed93..1cfd3d5 100644
--- a/src/includes/class-convert.php
+++ b/src/includes/class-convert.php
@@ -52,7 +52,6 @@ class Convert {
 	 *
 	 * @param  int  $p_int_value  Value to be converted.
 	 * @param  bool $p_bool_upper_case  Whether to convert the value to upper-case.
-	 * @return  string
 	 *
 	 * @since  1.0-gamma
 	 * @todo  Replace with built-in char casting.
@@ -102,7 +101,6 @@ class Convert {
 	 *
 	 * @param  int  $p_int_value  Value to be converted.
 	 * @param  bool $p_bool_upper_case  Whether to convert the value to upper-case.
-	 * @return  string
 	 *
 	 * @since  1.0-gamma
 	 */
diff --git a/src/includes/class-settings.php b/src/includes/class-settings.php
index 2f8f09a..e21b1c9 100644
--- a/src/includes/class-settings.php
+++ b/src/includes/class-settings.php
@@ -1112,7 +1112,7 @@ class Settings {
 	 *
 	 * @since  1.5.0
 	 */
-	private static $a_obj_instance = null;
+	private static $a_obj_instance;
 
 	/**
 	 * Contains all Settings Container names.
diff --git a/src/public/class-parser.php b/src/public/class-parser.php
index 41fbde2..6bbfe62 100644
--- a/src/public/class-parser.php
+++ b/src/public/class-parser.php
@@ -797,9 +797,7 @@ class Parser {
 			foreach ( $l_arr_sections_raw as $l_str_section ) {
 				$l_arr_sections_processed[] = self::exec( $l_str_section, true );
 			}
-
-			$p_str_content = implode( $l_arr_sections_processed );
-			return $p_str_content;
+			return implode( $l_arr_sections_processed );
 
 		}
 	}
@@ -1908,9 +1906,6 @@ class Parser {
 				$l_str_hard_link_address .= self::$a_str_post_container_id_compound;
 				$l_str_hard_link_address .= $l_str_footnote_id . '"';
 				$l_str_hard_link_address .= $l_str_use_backbutton_hint;
-
-				// Compose optional opening link tag with optional hard link, mandatory for instance.
-				self::$a_str_link_open_tag = '<a' . $l_str_hard_link_address;
 				self::$a_str_link_open_tag = ' class="footnote_hard_back_link">';
 
 			} else {