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@ 2020-08-04T00:19:10Z

<?php

trait WithFinalPrivate
{
    public function test() {
        $this->privateNonOverloadable();
        $this->nonFinal();
        self::privateNonOverloadable();
        self::nonFinal();
    }
    final private function privateNonOverloadable() {
        echo __TRAIT__, '::', __FUNCTION__, PHP_EOL;
    }
    private function nonFinal() {
        echo __TRAIT__, '::', __FUNCTION__, PHP_EOL;
    }
}

class Child {
    use WithFinalPrivate;

    public function childTest() {
        $this->privateNonOverloadable();
        $this->nonFinal();
        self::privateNonOverloadable();
        self::nonFinal();
    }
    private function privateNonOverloadable() {
        echo __CLASS__, '::', __FUNCTION__, PHP_EOL;
    }
    private function nonFinal() {
        echo __CLASS__, '::', __FUNCTION__, PHP_EOL;
    }
}

$obj = new Child;
$obj->childTest();
$obj->test();

Output for git.master, git.master_jit, rfc.property-hooks: Warning: Private methods cannot be final as they are never overridden by other classes in /in/VOPVj on line 11 Child::privateNonOverloadable Child::nonFinal Child::privateNonOverloadable Child::nonFinal Child::privateNonOverloadable Child::nonFinal Child::privateNonOverloadable Child::nonFinal

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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