objet.php

<?php
    class personne {
        public $nom;
        public $prenom;
        public $date;
        public $adresse;

        public function getInfos() {
            echo $this->nom.' '.$this->prenom.' '.$this->date.' '.$this->adresse;
        }

        public function setAdresse($newAdresse) {
            $this->adresse = $newAdresse;
            return $this;
        }

        public function getAge() {
            $birthDate = $this->birthDate;
            $birthDate = explode("/", $birthDate);
            //get age from date or birthdate
            $age = (date("md", date("U", mktime(0, 0, 0, $birthDate[0], $birthDate[1], $birthDate[2]))) > date("md")
                ? ((date("Y") - $birthDate[2]) - 1)
                : (date("Y") - $birthDate[2]));
            echo "Age is:" . $age;
        }
    }
?>