- chr: documentation ( source)
- ord: documentation ( source)
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By: a guest on Apr 10th, 2014 | syntax: PHP | size: 2.80 KB | hits: 27 | expires: Never
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<?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(){
$unCaesar = function ($input, $shift){
$output = "";
for ($i=0;$i<strlen($input);$i++) {
$ascii = ord($input[$i]);
for($j=0;$j<$shift;$j++){
if($input[$i] == " " || $input[$i] == "."){
// Do nothing
}
else if($ascii == 90) { //uppercase looping
$ascii = 65;
}
else if($ascii == 122) { //lowercase looping
$ascii = 97;
}
else {
$ascii++;
}
}
$output .= chr($ascii);
}
return $output;
};
$this->secret = $unCaesar($this->secret, 13);
};
$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();