如何在 PHP 中获取网页的 HTML 代码？
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How do I get the HTML code of a web page in PHP?
提问by Prashant
I want to retrieve the HTML code of a link (web page) in PHP. For example, if the link is
我想在 PHP 中检索链接（网页）的 HTML 代码。例如，如果链接是
https://stackoverflow.com/questions/ask
https://stackoverflow.com/questions/ask
then I want the HTML code of the page which is served. I want to retrieve this HTML code and store it in a PHP variable.
然后我想要提供的页面的 HTML 代码。我想检索此 HTML 代码并将其存储在 PHP 变量中。
How can I do this?
我怎样才能做到这一点？
回答by Greg
If your PHP server allows url fopen wrappers then the simplest way is:
如果您的 PHP 服务器允许 url fopen 包装器，那么最简单的方法是：
$html = file_get_contents('https://stackoverflow.com/questions/ask');
If you need more control then you should look at the cURLfunctions:
如果您需要更多控制，那么您应该查看cURL函数：
$c = curl_init('https://stackoverflow.com/questions/ask');
curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
//curl_setopt(... other options you want...)
$html = curl_exec($c);
if (curl_error($c))
die(curl_error($c));
// Get the status code
$status = curl_getinfo($c, CURLINFO_HTTP_CODE);
curl_close($c);
回答by Dmitri Pisarev
Also if you want to manipulate the retrieved page somehow, you might want to try some php DOM parser. I find PHP Simple HTML DOM Parservery easy to use.
此外，如果您想以某种方式操作检索到的页面，您可能想尝试一些 php DOM 解析器。我发现PHP Simple HTML DOM Parser非常易于使用。
回答by Ickmund
You may want to check out the YQL libraries from Yahoo: http://developer.yahoo.com/yql
您可能想查看 Yahoo 的 YQL 库：http: //developer.yahoo.com/yql
The task at hand is as simple as
手头的任务很简单
select * from html where url = 'http://stackoverflow.com/questions/ask'
You can try this out in the console at: http://developer.yahoo.com/yql/console(requires login)
您可以在控制台中尝试此操作：http: //developer.yahoo.com/yql/console（需要登录）
Also see Chris Heilmanns screencast for some nice ideas what more you can do: http://developer.yahoo.net/blogs/theater/archives/2009/04/screencast_collating_distributed_information.html
另请参阅 Chris Heilmanns 截屏视频，了解您还可以做什么：http: //developer.yahoo.net/blogs/theater/archives/2009/04/screencast_collating_distributed_information.html
回答by Stefan Gehrig
Simple way:Use file_get_contents():
简单的方法：使用file_get_contents()：
$page = file_get_contents('http://stackoverflow.com/questions/ask');
Please note that allow_url_fopenmust be truein you php.inito be able to use URL-aware fopen wrappers.
请注意，allow_url_fopen一定要true在你php.ini能够使用URL的fopen封装。
More advanced way:If you cannot change your PHP configuration, allow_url_fopenis falseby default and if ext/curl is installed, use the cURLlibraryto connect to the desired page.
更先进的方式：如果你不能改变你的PHP配置，allow_url_fopen是false在默认情况下，如果安装了分机/卷曲，使用cURL库连接到所需的页面。
回答by piglot
you could use file_get_contents if you are wanting to store the source as a variable however curl is a better practive.
如果您想将源存储为变量，则可以使用 file_get_contents，但 curl 是更好的做法。
$url = file_get_contents('http://example.com');
echo $url;
this solution will display the webpage on your site. However curl is a better option.
此解决方案将在您的网站上显示网页。但是 curl 是更好的选择。
回答by sarath
include_once('simple_html_dom.php');
$url="http://stackoverflow.com/questions/ask";
$html = file_get_html($url);
You can get the whole HTML code as an array (parsed form) using this code Download the 'simple_html_dom.php' file here http://sourceforge.net/projects/simplehtmldom/files/simple_html_dom.php/download
您可以使用此代码将整个 HTML 代码作为数组（解析形式）在此处下载“simple_html_dom.php”文件 http://sourceforge.net/projects/simplehtmldom/files/simple_html_dom.php/download
回答by Sergei
回答by T.Todua
Here is two different, simple ways to get content from URL:
这是从 URL 获取内容的两种不同的简单方法：
1) the first method
1）第一种方法
Enable Allow_url_include from your hosting (php.ini or somewhere)
从您的主机（php.ini 或其他地方）启用 Allow_url_include
<?php
$variableee = readfile("http://example.com/");
echo $variableee;
?>
or
或者
2)the second method
2）第二种方法
Enable php_curl, php_imap and php_openssl
启用 php_curl、php_imap 和 php_openssl
<?php
// you can add anoother curl options too
// see here - http://php.net/manual/en/function.curl-setopt.php
function get_dataa($url) {
$ch = curl_init();
$timeout = 5;
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$variableee = get_dataa('http://example.com');
echo $variableee;
?>
回答by Krishnamoorthy Acharya
you can use the DomDocument method to get an individual HTML tag level variable too
您也可以使用 DomDocument 方法来获取单个 HTML 标记级别的变量
$homepage = file_get_contents('https://www.example.com/');
$doc = new DOMDocument;
$doc->loadHTML($homepage);
$titles = $doc->getElementsByTagName('h3');
echo $titles->item(0)->nodeValue;
回答by Ken
$output = file("http://www.example.com");didn't work until I enabled: allow_url_fopen, allow_url_include,and file_uploadsin php.inifor PHP7
$output = file("http://www.example.com");没有工作，直到我启用了：allow_url_fopen, allow_url_include,和file_uploads在php.ini对PHP7
