<?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']));
});
preferences:
65.81 ms | 402 KiB | 5 Q