- reset: documentation ( source)
- print_r: documentation ( source)
- preg_split: documentation ( source)
- key: documentation ( source)
- join: 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
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;
}
}
$test = new Test;
// start editing here
function decode($N,$alphabet,$msg){
// Initialization
$M = count($alphabet);
$decrypt = array();
$decode = array();
$encrypted = preg_split("//",$msg, -1, PREG_SPLIT_NO_EMPTY);
// Compute the decoding map
$decode[' '] = ' ';
foreach ($alphabet as $n=>$v){
$decode[$v] = $alphabet[($M+($n-$N)) % $M]; // Compute the decoding map for $v
}
foreach ($encrypted as $v){
$decrypt[] = $decode[$v];
}
return join('',$decrypt);
}
$array = (array) $test;
reset($array);
$first_key = key($array);
print_r($array[$first_key]);
//used this to figure out the count:
// http://rumkin.com/tools/cipher/caesar.php
$key = decode(13,25, $array[$first_key]);
// end editing here
echo $test->run();