intermediate 15 min read

Classes & Objects

Creating classes, properties, methods, constructors, and object instantiation.

Classes & Objects

class User {
    // Properties with types
    public string \$name;
    private int \$age;
    protected string \$email;

    // Constructor (PHP 8+ promoted properties)
    public function __construct(
        public string \$username,
        private string \$password,
    ) { }

    // Methods
    public function getName(): string {
        return \$this->name;
    }

    // Static methods
    public static function createGuest(): self {
        return new self("guest", "");
    }
}

// Instantiation
\$user = new User("alice", "secret");
echo \$user->username;

Visibility

public — accessible everywhere
protected — accessible in class and subclasses
private — accessible only in defining class

Examples

<?php
class Product {
    public function __construct(
        public string $name,
        private float $price,
    ) {}
    public function getPrice(): float {
        return $this->price;
    }
}
$p = new Product('Widget', 9.99);
echo $p->name . ': $' . $p->getPrice();

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Classes & Objects

Classes & Objects

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