PRGC 2 Solution

123

<?php
class x implements PrgcContract, ArrayAccess, JsonSerializable
{
	const a_list = [1, 2, 3, FX, FY, FZ, 1];
	const b_list = [1, 0, "bcd"];
	const c_list = ["\x70", '\x70', '{$_POST[x]->e}'];
	const z_list = [123, 456, 789];
	private $aOffset = 0;
	private $bOffset = 0;
	private $cOffset = 0;
	private $dOffset = 0;
	private $eOffset = 0;
	private $zOffset = 0;
	private $invoke  = 0;
	private $container = [];
	private $invoke2 = "";
	private $e;
	private $z = 0;
	public function __get($k)
	{
		if ($k == "a") 
			return self::a_list[$this->aOffset++];
		if ($k == "b") 
			return self::b_list[$this->bOffset++];
		if ($k == "c")
			return self::c_list[$this->cOffset++];
		if ($k == "d")
			return self::a_list[$this->dOffset++];
	}
	public function go()
	{
		throw new PrgcException;
	}
	public function __call($f, $x)
	{
		if ($f == "abc123" || $f == $_POST["z"])
			return $this;
		if ($f == $_POST["z"].FX.FY.FZ)
			return 123;
	}
	public function __invoke($x=null)
	{
		if ($this->z===2) return self::z_list[$this->zOffset++];
		if ($this->z) {
			$this->z++;
			return $this;	
		} 
		if ($x === null) 
			return substr($this->invoke2, 0, 65535 - $this->invoke++);
		$this->invoke2 = $x;
		return true;
	}
	public function &offsetGet($k)
	{
		if ($k == "?") return $this;
		return $this->container[$k];
	}

	public function amp($e)
	{
		$this->z++;
		$this->container["y"]["z"] = $e;
	}

	public function offsetSet($k,$v)
	{
	}
	public function offsetExists($k)
	{
	}
	public function offsetUnset($k)
	{
	}
	public function jsonSerialize()
	{
		return [1, 2, 3];
	}
}