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<?php 

    class User {
        public $name;
        public $age;
        public static $minPassLength = 6;

        public static function validatePass($pass) {
            // We use self:: because $minPassLength is static
            if(strlen($pass) >= self::$minPassLength) {
                return true;
            } else {
                return false;
            }
        }
    }

$password = 'hello1';

    if(User::validatePass($password)) {
        echo 'Password valid';
    } else {
        echo 'Password NOT valid';
    }

<?php

    class User {
        protected $name;
        protected $age;

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

    class Customer extends User {
        private $balance;

        public function __construct($name, $age, $balance) {
            parent::__construct($name, $age);
            $this -> balance = $balance;
        }

        public function pay($amounth) {
            return $this -> name . ' paid $' . $amounth;
        }

        public function getBalance() {
            return $this -> balance;
        }
    }

    $customer1 = new Customer('John', 41, 500);

    echo $customer1 ->pay(100) . ' and has left ' . $customer1 -> getBalance();

<?php

    class User {
        private $name;
        private $age;

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

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

        // __get MAGIC METHOD
        public function __get($property) {
            if(property_exists($this, $property)) {
                return $this -> $property;
            }
        }

        // __set MAGIC METHOD
        public function __set($property, $value) {
            if(property_exists($this, $property)) {
                return $this -> $property = $value;
            }
            return $this;
        }

    }

$user1 = new User('John', 40);

//echo $user1 -> setName('Jeff');
//echo $user1 -> getName();

$user1 -> __set('age', 41);
echo $user1 -> __get('name') . '<br>';
echo $user1 -> __get('age') . '<br>';

<?php

    class User {
        public $name;
        public $age;

    // Runs when an object is created
    public function __construct($name, $age) {
        echo 'Class ' . __CLASS__ . ' is instanciated<br>';
        $this -> name = $name;
        $this -> age = $age;
    }


    public function sayHello() {
        return $this -> name . ' says hello!';
    }

    // Called when no other references to a certain object
    // Used for cleanup, closing conntections etc
    public function __destruct() {
        echo 'destructor ran....';
    }

}

$user1 = new User('Brad', 36);


echo $user1 -> name . '<br>';
echo $user1 -> age . '<br>';
echo $user1 -> sayHello() . '<br>';

$user2 = new User('Jeff', 45);

echo $user2 -> name . ' is ' . $user2 -> age . ' years old<br>';

<?php 
    // Define a class
    class User {
    // Properties (attributes)
    public $name = 'Brad';

    // Methods (functions)
    public function sayHello() {
        return $this->name . ' Says Hello';
    }

}

// Instatiate a user object from the user class
$user1 = new User();
$user1 -> name = 'Brad';

echo $user1 -> name;
echo '<br>';
echo $user1 -> sayHello();

echo '<br>';

// Create new user

$user2 = new User();
$user2 -> name = 'Jeff';

echo $user2 -> name;
echo '<br>';
echo $user2 -> sayHello();