Simple Entity class

Entity.php

<?php

class Entity
{
    protected $touched = false;
    
    public function __construct($aData)
    {
        foreach($aData as $key => $val) {
            $this->{$key} = $val;
        }
    }
    
    public function has($key)
    {
        return isset($this->{$key}) && $this->{$key} !== null;
    }
    
    public function get($key)
    {
        return $this->{$key};
    }
    
    public function set($key, $val)
    {
        $this->touched = true;
        $this->{$key} = $val;
        return $this;
  
    }
    
    public function isTouched()
    {
        return $this->touched;
    }
}