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@ 2023-12-04T19:09:36Z

<?php

abstract class AAA {
    public function foo () {
        echo $this->childValue();
    }
    
    abstract public function childValue(): string;
}

class XXXXXX extends AAA {
    public function childValue (): string {
        return "x";
    }
}

class YYYYYY extends AAA {
    public function childValue (): string {
        return "y";
    }
}

class ZZZZZZ extends AAA {
    public function childValue (): string {
        return "z";
    }
}

//class WRONG extends AAA {
    // if empty:
    // Fatal error: Class WRONG contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (AAA::childValue) in /tmp/preview on line 29
//}

$objX = new XXXXXX();
$objX->foo();
$objY = new YYYYYY();
$objY->foo();
$objZ = new ZZZZZZ();
$objZ->foo();

Output for git.master_jit, git.master, rfc.property-hooks: xyz

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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56.62 ms | 405 KiB | 5 Q