- str_rot13: documentation ( source)
<?php
/*
Challenge 1: Modify Test::$secret before it's output.
Rules::
1. No use of Reflection API / runkit extension
2. No stopping execution before Test::run()
3. No Exceptions or PHP errors / warnings notices allowed
4. No redefining $test
Hints:
1. Caesar
2. Magic methods
3. Requires a new feature of PHP 5.4
*/
class Test
{
private $secret = 'Nyy lbhe Onfr ner orybat gb hf.';
private $callback;
final public function run()
{
call_user_func($this->callback);
return $this->secret . PHP_EOL;
}
public function __set($k, $v)
{
$key = $v[($v[$v])]; // $v is some kind of weird array
$value = $v(); // and a callback!
$this->{$key} = $value;
}
}
$test = new Test;
// start editing here
Class V implements arrayaccess{
protected $array = array(
'arraykey' => 'arraykey2',
'arraykey2' => 'callback',
);
public $closure;
function __construct($test)
{
$this->closure = function(){
$this->secret = str_rot13($this->secret);
};
$this->closure = $this->closure->bindTo($test, $test);
}
function __invoke()
{
return $this->closure;
}
function __toString()
{
return "arraykey";
}
public function offsetSet($offset, $value)
{
if (is_null($offset))
{
$this->array[] = $value;
}
else
{
$this->array[$offset] = $value;
}
}
public function offsetExists($offset)
{
return isset($this->array[$offset]);
}
public function offsetUnset($offset)
{
unset($this->array[$offset]);
}
public function offsetGet($offset)
{
$offset = (string) $offset;
return isset($this->array[$offset]) ? $this->array[$offset] : null;
}
}
$v = new V($test);
$test->callback = $v;
// end editing here
echo $test->run();