Test getting properties/attributes from object/class in PHP.

testGetPropertiesFromClass.php

<?php

/**
 * Test getting properties/attributes from object/class.
 *
 * It considers the following characteristics:
 *      visibility: public, protected, private
 *      abstraction: "normal", static, magic
 *      default value: with or without initial value
 *      updated value: whether or not its initial value is changed
 *
 * See the conclusion below.
 *
 * @author Wesley Gonçalves <dev@wesleygoncalves.com>
 * 
 * @version 1.0.0
 * 
 * @link https://gist.githubusercontent.com/WesleyGoncalves/9b2fe427e0a811cb95f109265becf119/raw/testGetPropertiesFromClass.php
 */

class Foo
{
    public $public_NoInitialValue_NotChanged;
    public $public_NoInitialValue_Changed;
    public $public_InitialValue_NotChanged = 'A-c';
    public $public_InitialValue_Changed = 'A-d';
    public static $public_Static_NoInitialValue_NotChanged;
    public static $public_Static_NoInitialValue_Changed;
    public static $public_Static_InitialValue_NotChanged = 'A-g';
    public static $public_Static_InitialValue_Changed = 'A-h';

    protected $protected_NoInitialValue_NotChanged;
    protected $protected_NoInitialValue_Changed;
    protected $protected_InitialValue_NotChanged = 'B-c';
    protected $protected_InitialValue_Changed = 'B-d';
    protected static $protected_Static_NoInitialValue_NotChanged;
    protected static $protected_Static_NoInitialValue_Changed;
    protected static $protected_Static_InitialValue_NotChanged = 'B-g';
    protected static $protected_Static_InitialValue_Changed = 'B-h';

    private $private_NoInitialValue_NotChanged;
    private $private_NoInitialValue_Changed;
    private $private_InitialValue_NotChanged = 'C-c';
    private $private_InitialValue_Changed = 'C-d';
    private static $private_Static_NoInitialValue_NotChanged;
    private static $private_Static_NoInitialValue_Changed;
    private static $private_Static_InitialValue_NotChanged = 'C-g';
    private static $private_Static_InitialValue_Changed = 'C-h';

    /**
     * @property mixed $magicProperty
     */



    public function __construct()
    {
        $this->public_NoInitialValue_Changed = 'A-B';
        $this->public_InitialValue_Changed = 'A-D';
        static::$public_Static_NoInitialValue_Changed = 'A-F';
        static::$public_Static_InitialValue_Changed = 'A-H';

        $this->protected_NoInitialValue_Changed = 'B-B';
        $this->protected_InitialValue_Changed = 'B-D';
        static::$protected_Static_NoInitialValue_Changed = 'B-F';
        static::$protected_Static_InitialValue_Changed = 'B-H';

        $this->private_NoInitialValue_Changed = 'C-B';
        $this->private_InitialValue_Changed = 'C-D';
        static::$private_Static_NoInitialValue_Changed = 'C-F';
        static::$private_Static_InitialValue_Changed = 'C-H';

        $this->MagicProperty = 'M-A';

    }

    public function fromInside()
    {
        echo PHP_EOL . "------------- OBJECT VARS ------------------";
        var_dump($props = get_object_vars($this));              // Conclusion:  static: no && magic: yes && normal: changed

        echo PHP_EOL . "------------- CLASS VARS ------------------";
        var_dump($attr = get_class_vars(get_class($this)));     // Conclusion:  static: changed && magic: no && normal: not changed

        echo PHP_EOL . "---------------------------------------------------------";
        echo PHP_EOL . "------------- MERGING Object INTO Vars ------------------";
        var_dump(array_merge($attr, $props));                   // Conclusion:  static: changed && magic: yes && normal: changed
    }
}

(new Foo())->fromInside();