Online PHP editor | rfc for JVK8u

@ 2013-03-28T00:32:22Z

<?php

class Context {

    private $context = null;
    private $data    = [];

    public function __construct(Context $context = null) {
        $this->context = $context;
    }

    public function get($name) {
        if (isset($this->data[$name])) {
            return $this->data[$name];
        }
        if (isset($this->context)) {
            return $this->context->get($name);
        }
        return null;
    }

    public function getAll(array $names) {
        $data = [];
        foreach ($names as $name) {
            $data[$name] = $this->get($name);
        }
        return $data;
    }

    public function set($name, $value) {
        $this->data[$name] = $value;
    }

    public function wrap() {
        return new Context($this);
    }

    public function call(callable $function) {
        call_user_func($function, $this);
    }

}

(new Context)->call(function(Context $c) {
        $c->set('foo', 1);
        $c->set('bar', 2);
        $c->wrap()->call(function(Context $c) {
                $c->set('bar', 3);
                $c->set('qux', 4);
                $c->wrap()->call(function(Context $c) {
                        $c->set('qux', 5);
                        $c->set('zip', 6);
                        var_dump($c->getAll(['foo',
                                'bar',
                                'qux',
                                'zip']));
                    });
                var_dump($c->getAll(['foo',
                        'bar',
                        'qux',
                        'zip']));
            });
        var_dump($c->getAll(['foo',
                'bar',
                'qux',
                'zip']));
    });

Output for git.master, git.master_jit, rfc.property-hooks: array(4) { ["foo"]=> int(1) ["bar"]=> int(3) ["qux"]=> int(5) ["zip"]=> int(6) } array(4) { ["foo"]=> int(1) ["bar"]=> int(3) ["qux"]=> int(4) ["zip"]=> NULL } array(4) { ["foo"]=> int(1) ["bar"]=> int(2) ["qux"]=> NULL ["zip"]=> NULL }

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
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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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