php__get_empty.php

<?php

class Person {

    private $name;

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

    public function __isset($key) {
        return isset($this->$key);
    }

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


$p1 = new Person('Yoda');
$p2 = new Person();

if (empty($p1->name)) {
    echo 'p1 name is empty' . PHP_EOL;
}
else {
    echo $p1->name . PHP_EOL;
}


if (empty($p2->name)) {
    echo 'p2 name is empty' . PHP_EOL;
}
else {
    echo $p2->name . PHP_EOL;
}