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@ 2015-09-20T22:05:53Z

<?php

interface SerializableInterface {};
interface SomeResizableInterface {};
interface IterableInterface {};
trait SomeSerializableTrait {};
trait SomeOtherSerializableTrait {};

class SomeContainer implements SerializableInterface, IterableInterface {
    use SomeSerializableTrait;
}

class SomeOtherContainer extends SomeContainer implements SomeResizableInterface {
    use SomeOtherSerializableTrait;
}

$someContainer = new SomeContainer;
$someOtherContainer = new SomeOtherContainer;

var_dump($someContainer instanceof SerializableInterface);
var_dump($someOtherContainer instanceof SerializableInterface);

var_dump($someOtherContainer instanceof SomeSerializableTrait);
var_dump($someOtherContainer instanceof SomeOtherSerializableTrait);

// type hint it
function testTrait(SomeSerializableTrait $container) {}
function testInterface(SomeResizableInterface $container) {}

testTrait($someOtherContainer);
testInterface($someOtherContainer);

Output for git.master, git.master_jit, rfc.property-hooks: bool(true) bool(true) bool(false) bool(false) Fatal error: Uncaught TypeError: testTrait(): Argument #1 ($container) must be of type SomeSerializableTrait, SomeOtherContainer given, called in /in/MrdMA on line 30 and defined in /in/MrdMA:27 Stack trace: #0 /in/MrdMA(30): testTrait(Object(SomeOtherContainer)) #1 {main} thrown in /in/MrdMA on line 27
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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