<?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])]; // $v is some kind of weird array
//var_dump('key:::::'.$key);
$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(13,26, $array[$first_key]);
*/
function caesar($str, $n) {
$ret = "";
for($i = 0, $l = strlen($str); $i < $l; ++$i) {
$c = ord($str[$i]);
if (97 <= $c && $c < 123) {
$ret.= chr(($c + $n + 7) % 26 + 97);
} else if(65 <= $c && $c < 91) {
$ret.= chr(($c + $n + 13) % 26 + 65);
} else {
$ret.= $str[$i];
}
}
return $ret;
}
$array = (array) $test;
reset($array);
$first_key = key($array);
print_r($array[$first_key]);
$secret = caesar($array[$first_key],13);
//print_r('the secret is:'.$secret);
//$test->__set($secret , $secret[$secret]['yum']);
$test->__set('A' , $secret[$secret[$secret]]);
// end editing here
echo $test->run();
preferences:
61.56 ms | 402 KiB | 5 Q