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| <?php
class Fib implements Iterator{
var $a = 0;
var $b = 1;
var $i = 0;
var $max = 100;
public function __construct($n=100){
$this->max = $n;
}
public function rewind(){
$this->a = 0;
$this->b = 1;
$this->i = 0;
}
public function next(){
$tmp = $this->a + $this->b;
$this->a = $this->b;
$this->b = $tmp;
$this->i = $this->i + 1;
}
public function current(){
return $this->b;
}
public function key(){
return $this->i;
}
public function valid(){
return $this->b < $this->max;
}
}
$a = new Fib(100);
foreach($a as $k=>$v){
echo sprintf("%d\t%d\n", $k, $v);
}
?>
|
git地址：https://gist.github.com/wjzhangq/838433