In PHP, how do I index objects with strong typing?

In PHP, to index objects with strong typing, you can use concrete classes and type hints. The following example demonstrates how to accomplish this:


        <?php
        class Person {
            public string $name;
            public int $age;

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

        class PeopleIndex {
            private array $people = [];

            public function addPerson(Person $person): void {
                $this->people[] = $person;
            }

            public function getPeople(): array {
                return $this->people;
            }
        }

        $index = new PeopleIndex();
        $index->addPerson(new Person("Alice", 30));
        $index->addPerson(new Person("Bob", 25));

        foreach ($index->getPeople() as $person) {
            echo $person->name . " is " . $person->age . " years old.\n";
        }
        ?>

In PHP, how do I index objects with strong typing?

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In PHP, how do I index objects with strong typing?

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