Read-only properties with IDE autocomplete

Person.php

<?php

/**
 * @property-read string $name
 * @property-read int $age
 */
class Person
{
    private $name;
    private $age;

    public function __construct($name, $age)
    {
        $this->name = $name;
        $this->age = $age;
    }

    public function __get($name)
    {
        return $this->{$name};
    }

    /**
     * @param $name
     * @param $value
     *
     * @throws \Exception
     */
    public function __set($name, $value)
    {
        throw new \Exception('Cannot mutate properties');
    }
}