<?php
#[AllowDynamicProperties]
class FIIFO {

    public function __construct() {
        $this->x = "x";
        throw new Exception;
    }

}

#[AllowDynamicProperties]
class hariCow extends FIIFO {

    public function __construct() {
        try {
            parent::__construct();
        } catch(Exception $e) {
        }
        $this->y = "y";
        try {
            $this->z = new FIIFO;
        } catch(Exception $e) {
        }
    }

    public function __toString() {
        return "Rusticus in asino sedet.";
    }

}

try {
    $db = new FIIFO();
} catch(Exception $e) {
}
var_dump($db);

$db = new hariCow;

var_dump($db);
?>