<?php

class DeferredChain {

	public $steps = array();
	public $lastStep;
	protected $pos = -1;
	protected $rules;


	public function __call($name,$arguments) {
		$m = '_'.$name;
		if(method_exists($this, $m)) {
			$this->steps[] = array($name,$arguments);

		}
		return $this;
	}

	public function doNext() {
		$this->pos++;
		$k = $this->pos;
		if(isset($this->steps[$k])) {
			$f = '_'.$this->steps[$k][0];
			$args = $this->steps[$k][1];

			// returns false if call_user_func_array encounters error
			$result = call_user_func_array(array($this,$f),$args);

			$this->lastStep = $this->steps[$k][0];

			return $result;
		} else {
			return false;
		}
	}

	public function doAll() {
		while(($res = $this->doNext()) !== false) {
			$results[] = $res;
		}
		return $results;
	}

}


?>