本文主要给大家介绍了关于PHP中请求url的五种方法，分享出来供大家参考学习，下面话不多说，来一起看看详细的介绍：
五种方法：
其中wget命令在本地虚机测试请求http://www.baidu.com时，没有成功，在远程服务器上却可以，考虑时DNS解析的问题，于是直接请求IP成功下载了index.html的文件。
这里只提供了方法，其中的优缺点需要详细了解每一个方法的功能和缺陷。
一、fopen()函数
PHP;">
$file = fopen("//www.jb51.cc","r") or die("打开远程文件失败!");
while (!feof($file)) {
$line = fgets($file,1024);
//使用正则匹配标题标记
if (preg_match("/(.*)<\/title>/i",$line,$out)) {
$title = $out[1]; //将<a href="/tag/biaoti/" target="_blank" class="keywords">标题</a><a href="/tag/biaoji/" target="_blank" class="keywords">标记</a>中的<a href="/tag/biaoti/" target="_blank" class="keywords">标题</a>字符取出
break; //<a href="/tag/tuichu/" target="_blank" class="keywords">退出</a>循环，结束远程<a href="/tag/wenjian/" target="_blank" class="keywords">文件</a>读取
}
}
fclose($file);</pre>
</div>
<p><h3>二、file()<a href="/tag/hanshu/" target="_blank" class="keywords">函数</a></h3></p>
<div class="jb51code">
<pre class="brush:<a href="/tag/PHP/" target="_blank" class="keywords">PHP</a>;">
$lines = file("//www.jb51.cc/article/48866.htm");
readfile(<a href="//www.jb51.cc/article/48866.htm">//www.jb51.cc/article/48866.htm</a>);</pre>
</div>
<p><h3>三、file_get_contents()函数</h3></p>
<div class="jb51code">
<pre class="brush:php;">
$content = file_get_contents(<a href="//www.jb51.cc/article/48866.htm">//www.jb51.cc/article/48866.htm</a>);</pre>
</div>
<p><h3>四、curl() 请求远程url数据</h3></p>
<div class="jb51code">
<pre class="brush:<a href="/tag/PHP/" target="_blank" class="keywords">PHP</a>;">
$url = "http://www.baidu.com";
$ch = curl_init();
$timeout = 5;
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
$contents = curl_exec($ch);
curl_close($ch);</pre>
</div>
<p><h3>五、exec() 执行命令行命令</h3></p>
<div class="jb51code">
<pre class="brush:<a href="/tag/PHP/" target="_blank" class="keywords">PHP</a>;">
//exec("wget 220.181.111.188");
shell_exec("wget 220.181.111.188");</pre>
</div>
<p><h3>总结</h3></p>
<p>以上就是这篇<a href="/tag/wenzhang/" target="_blank" class="keywords">文章</a>的全部<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>了，希望本文的<a href="/tag/neirong/" target="_blank" class="keywords">内容</a>对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对编程之家的<a href="/tag/zhichi/" target="_blank" class="keywords">支持</a>。</p></div>
<div class="topcard-tags"><a href="/tag/phpp/" class="tag_link" target="_blank">php</a><a href="/tag/phpfasongurlqingqiu/" class="tag_link" target="_blank">php发送url请求</a><a href="/tag/huoquqingqiuurl/" class="tag_link" target="_blank">获取请求url</a><a href="/tag/qingqiuurl/" class="tag_link" target="_blank">请求url</a></div>
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