Adhere to PSR-12 coding styles

src/Traits/Getter.php

@@ -1,4 +1,5 @@
-<?php declare(strict_types=1);
+<?php
+
 /**
  * Useful PHP Traits
  * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
@@ -17,6 +18,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+declare(strict_types=1);
+
 namespace OCC\Traits;
 
 /**
@@ -24,25 +27,21 @@ namespace OCC\Traits;
  *
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package opencultureconsulting/traits
- * @access public
  */
 trait Getter
 {
     /**
      * Read data from an inaccessible property.
      *
-     * @access public
+     * @param string $property The class property to get
-     * @final
      *
-     * @param string $property
+     * @return mixed The class property's current value
-     *
-     * @return mixed
      *
      * @throws \InvalidArgumentException
      */
     final public function __get(string $property): mixed
     {
-        $method = 'get' . ucfirst($property);
+        $method = '_get' . ucfirst($property);
         if (
             property_exists(__CLASS__, $property)
             && method_exists(__CLASS__, $method)
@@ -56,12 +55,9 @@ trait Getter
     /**
      * Check if an inaccessible property is set and not empty.
      *
-     * @access public
+     * @param string $property The class property to check
-     * @final
      *
-     * @param string $property
+     * @return bool Whether the class property is set and not empty
-     *
-     * @return bool
      */
     final public function __isset(string $property): bool
     {

src/Traits/Setter.php

@@ -1,4 +1,5 @@
-<?php declare(strict_types=1);
+<?php
+
 /**
  * Useful PHP Traits
  * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
@@ -17,6 +18,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+declare(strict_types=1);
+
 namespace OCC\Traits;
 
 /**
@@ -24,18 +27,14 @@ namespace OCC\Traits;
  *
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package opencultureconsulting/traits
- * @access public
  */
 trait Setter
 {
     /**
      * Write data to an inaccessible property.
      *
-     * @access public
+     * @param string $property The class property to set
-     * @final
+     * @param mixed $value The new value of the property
-     *
-     * @param string $property
-     * @param mixed $value
      *
      * @return void
      *
@@ -43,7 +42,7 @@ trait Setter
      */
     final public function __set(string $property, mixed $value): void
     {
-        $method = 'set' . ucfirst($property);
+        $method = '_set' . ucfirst($property);
         if (
             property_exists(__CLASS__, $property)
             && method_exists(__CLASS__, $method)
@@ -57,10 +56,7 @@ trait Setter
     /**
      * Unset an inaccessible property.
      *
-     * @access public
+     * @param string $property The class property to unset
-     * @final
-     *
-     * @param string $property
      *
      * @return void
      *

src/Traits/Singleton.php

@@ -1,4 +1,5 @@
-<?php declare(strict_types=1);
+<?php
+
 /**
  * Useful PHP Traits
  * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
@@ -17,35 +18,25 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+declare(strict_types=1);
+
 namespace OCC\Traits;
 
 /**
- * Allows just a single instance of a class.
+ * Allows just a single instance of the class using this trait.
  *
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package opencultureconsulting/traits
- * @access public
  */
 trait Singleton
 {
     /**
-     * Holds the singleton instance.
+     * Holds the singleton instances.
-     *
-     * @access private
-     * @static
-     *
-     * @var self
      */
     private static ?self $singleton;
 
     /**
      * Get a singleton instance of this class.
-     *
-     * @access public
-     * @final
-     * @static
-     *
-     * @return self
      */
     final public static function getInstance(): self
     {
@@ -59,18 +50,11 @@ trait Singleton
     /**
      * This is a singleton class, thus the constructor is private.
      * (Get an instance of this class by calling self::getInstance())
-     *
-     * @access private
-     * @abstract
      */
     abstract private function __construct();
 
     /**
      * This is a singleton class, thus cloning is prohibited.
-     *
-     * @access private
-     *
-     * @return void
      */
     final private function __clone(): void
     {