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@ 2013-08-03T12:08:44Z

<?php
class World {
    static $id = 0;
    protected $uid;
	protected $worldName;
    const type = 'world';

	public function __construct( $worldName ) {
        $this->setUID();
		$this->worldName = $worldName;
    }

    private function setUID() {
		$this->uid = self::$id++;
    }

    public function whoIsPerson( Person $person ) {
        $personUID = $person->getUID();
        
		if( $personUID === 0 && $this->worldName === 'Rapture' )
            return 'Jack';
        elseif( $personUID === 0 && $this->worldName === 'Columbia' )
            return 'Elizabeth';
        else
            return 'Unknown Person';
    }
}

class Person {
    static $id = 0;
	protected $uid;

    private function setUID() {
		$this->uid = self::$id++;
    }

    public function getUID() {
		return $this->uid;
    }
}

$person1 = new Person();

$world1 = new World('Rapture');
echo $world1->whoIsPerson( $person1 );

$world2 = new World('Columbia');
echo $world2->whoIsPerson( $person1 );

var_dump( $person1, $world1, $world2 );

Output for git.master, git.master_jit, rfc.property-hooks: Unknown PersonUnknown Personobject(Person)#1 (1) { ["uid":protected]=> NULL } object(World)#2 (2) { ["uid":protected]=> int(0) ["worldName":protected]=> string(7) "Rapture" } object(World)#3 (2) { ["uid":protected]=> int(1) ["worldName":protected]=> string(8) "Columbia" }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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