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@ 2014-03-28T17:33:44Z

<?php

interface Counter
{
    /** @return self */
    public function count();

    /** @return int */
    public function getCount();
}

class FluentCounter implements Counter
{
    private $count = 0;

    public function count()
    {
        $this->count += 1;

        return $this;
    }

    public function getCount()
    {
        return $this->count;
    }
}

class EchoingCounter implements Counter
{
    private $counter;

    public function __construct(Counter $counter)
    {
        $this->counter = $counter;
    }

    public function count()
    {
        echo __METHOD__ . "\n";

        return $this->counter->count();
    }

    public function getCount()
    {
        echo __METHOD__ . "\n";

        return $this->counter->getCount();
    }
}

$counter = new EchoingCounter(new FluentCounter());

$counter = $counter->count()->count()->count()->count();

echo $counter->getCount();

Output for git.master, git.master_jit, rfc.property-hooks: EchoingCounter::count 4

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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