PHP每次读取多个URL函数

/**
 * 每次读取多个URL函数
 * @param $urls array 要读取的URL列表
 * @param $num int 每次读取个数
 * @param $head_only bool 是否只读取HTTP头

 * @return array 所有读取到的内容或HTTP头
 */	
function MultiRequest($urls,$num=5,$head_only=false){

	$urls2=array();
	while(count($urls)){			
		$urls2[] = array_splice($urls,0,$num);		
	}

	$datas=array();

	if($head_only){
		foreach($urls2 as $urls){
			$m = new Http_MultiRequest();
			$m->setUrls($urls);
			$data = $m->exec_head();
			$datas =array_merge ($datas, $data);
		}

		foreach($datas  as $k=>$v){
				//错误的页面
				if($v['http_code'] == $error_http_code && $v['download_content_length'] == $error_length) {
					$v['http_code'] ='404';
					//continue;
				}
				$v2=array(
					'url'=>$v['url'],
					'content_type'=>$v['content_type'],
					'http_code'=>$v['http_code'],
					'content_length'=>$v['download_content_length'],			
				);
				$datas[$k] = $v2;
				//if($v['http_code']!='200')unset($data[$k]);
		}
	}else{
		foreach($urls2 as $urls){
			$m = new Http_MultiRequest();
			$m->setUrls($urls);
			$data = $m->exec();
			$datas =array_merge ($datas, $data);
		}
	}
	return $datas;

}

PHP 批量抓取内容 Http_MultiRequest   类参考:http://liulipeng01.blog.163.com/blog/static/1957710582012710104322244/