PHP 利用 Curl 函数实现多线程抓取网页和下载文件

<p>$urls = array( </p>'http://www.scutephp.com/', <br />'http://www.google.com/', <br />'http://www.example.com/' <br />); // 设置要抓取的页面URL <br />$save_to='/test.txt'; // 把抓取的代码写入该文件 <br />$st = fopen($save_to,"a"); <br />$mh = curl_multi_init(); <br />foreach ($urls as $i => $url) { <br />$conn[$i] = curl_init($url); <br />curl_setopt($conn[$i], CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)"); <br />curl_setopt($conn[$i], CURLOPT_HEADER ,0); <br />curl_setopt($conn[$i], CURLOPT_CONNECTTIMEOUT,60); <br />curl_setopt($conn[$i], CURLOPT_FILE,$st); // 将爬取的代码写入文件 <br />curl_multi_add_handle ($mh,$conn[$i]); <br />} // 初始化 <br />do { <br />curl_multi_exec($mh,$active); <br />} while ($active); // 执行 <br />foreach ($urls as $i => $url) { <br />curl_multi_remove_handle($mh,$conn[$i]); <br />curl_close($conn[$i]); <br />} // 结束清理 <br />curl_multi_close($mh); <br /><p>fclose($st);

<p>$urls = array( </p>'http://www.scutephp.com/', <br />'http://www.google.com/', <br />'http://www.example.com/' <br />); <br />$save_to='/test.txt'; // 把抓取的代码写入该文件 <br />$st = fopen($save_to,"a"); <br />$mh = curl_multi_init(); <br />foreach ($urls as $i => $url) { <br />$conn[$i] = curl_init($url); <br />curl_setopt($conn[$i], CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)"); <br />curl_setopt($conn[$i], CURLOPT_HEADER ,0); <br />curl_setopt($conn[$i], CURLOPT_CONNECTTIMEOUT,60); <br />curl_setopt($conn[$i],CURLOPT_RETURNTRANSFER,true); // 不将爬取代码写到浏览器，而是转化为字符串 <br />curl_multi_add_handle ($mh,$conn[$i]); <br />} <br />do { <br />curl_multi_exec($mh,$active); <br />} while ($active); <br />foreach ($urls as $i => $url) { <br />$data = curl_multi_getcontent($conn[$i]); // 获得爬取的代码字符串 <br />fwrite($st,$data); // 将字符串写入文件<br />} // 获得数据变量，并写入文件 <br />foreach ($urls as $i => $url) { <br />curl_multi_remove_handle($mh,$conn[$i]); <br />curl_close($conn[$i]); <br />}<br />curl_multi_close($mh); <br /><p>fclose($st);

<p>$urls=array(</p>	'http://www.scutephp.com/5w.zip',<br />	'http://www.scutephp.com/5w.zip',<br />	'http://www.scutephp.com/5w.zip'<br />);<br />$save_to='./home/';<br />$mh=curl_multi_init();<br />foreach($urls as $i=>$url){<br />	$g=$save_to.basename($url);<br />	if(!is_file($g)){<br />		$conn[$i]=curl_init($url);<br />		$fp[$i]=fopen($g,"w");<br />		curl_setopt($conn[$i],CURLOPT_USERAGENT,"Mozilla/4.0(compatible; MSIE 7.0; Windows NT 6.0)");<br />		curl_setopt($conn[$i],CURLOPT_FILE,$fp[$i]);<br />		curl_setopt($conn[$i],CURLOPT_HEADER ,0);<br />		curl_setopt($conn[$i],CURLOPT_CONNECTTIMEOUT,60);<br />		curl_multi_add_handle($mh,$conn[$i]);<br />	}<br />}<br />do{<br />	$n=curl_multi_exec($mh,$active);<br />}while($active);<br />foreach($urls as $i=>$url){<br />	curl_multi_remove_handle($mh,$conn[$i]);<br />	curl_close($conn[$i]);<br />	fclose($fp[$i]);<br />}<br />curl_multi_close($mh);$urls=array(<br />	'http://www.scutephp.com/5w.zip',<br />	'http://www.scutephp.com/5w.zip',<br />	'http://www.scutephp.com/5w.zip'<br />);<br />$save_to='./home/';<br />$mh=curl_multi_init();<br />foreach($urls as $i=>$url){<br />	$g=$save_to.basename($url);<br />	if(!is_file($g)){<br />		$conn[$i]=curl_init($url);<br />		$fp[$i]=fopen($g,"w");<br />		curl_setopt($conn[$i],CURLOPT_USERAGENT,"Mozilla/4.0(compatible; MSIE 7.0; Windows NT 6.0)");<br />		curl_setopt($conn[$i],CURLOPT_FILE,$fp[$i]);<br />		curl_setopt($conn[$i],CURLOPT_HEADER ,0);<br />		curl_setopt($conn[$i],CURLOPT_CONNECTTIMEOUT,60);<br />		curl_multi_add_handle($mh,$conn[$i]);<br />	}<br />}<br />do{<br />	$n=curl_multi_exec($mh,$active);<br />}while($active);<br />foreach($urls as $i=>$url){<br />	curl_multi_remove_handle($mh,$conn[$i]);<br />	curl_close($conn[$i]);<br />	fclose($fp[$i]);<br />}<br />curl_multi_close($mh);