一个PHP爬虫框架
简单的教程请参考：http://blog.reetsee.com/archives/366
注意：PHP 5.4.x可能有BUG以至于有时候执行iframe_example.php出错，如果出现这种情况，请尝试PHP 5.5.x
A PHP web crawler framework
A simple guide please refer to:http://blog.reetsee.com/archives/366
NOTE: PHP 5.4.x may have bugs that sometimes iframe_example.php doesn't work, if so, try PHP 5.5.x