在php中显示网页的页面源代码 - display the page source of a web page in php

如何在字符串变量中检索特定网页的整个页面源信息，并在php中进行回显。我是php的新手，没有这样做的想法，任何人都可以给我完整的源代码吗。以下是我的源代码：

<?php
$dom = new DOMDocument;
$dom->loadHtmlFile('http://www.google.com');
$xpath = new DOMXPath($dom);
$elements = $xpath->query('//input[@name="session_id"]');
if ($elements->length) {
    echo "found: ", $elements->item(0)->getAttribute('value');
} else {
    echo "not found";
}
}
?>

我已经用替换了上面的代码

刚刚将url更改为：'http://www.flipkart.com/professional-android-2-application-development-8126525894/p/itmdytmwpjzyhade?pid=9788126525898&参考=8a47bf68-7558-43ce-a9b2-17c1a19e84'

但它给出了以下错误：警告：file_get_contents(http://www.flipkart.com/professional-android-2-application-development-8126525894/p/itmdytmwpjzyhade?pid=9788126525898&ref=8a47bf68-7558-43ce-a9b2-17c1a19e84）[函数.file获取内容]：无法打开流：HTTP请求失败！在第2行的C:''wamp''www''displaycontentswebpage.php中

预期结果：（页面来源）

<title>Professional Android 2 Application Development 8126525894: Book: Reto Meier (9788126525898) | Flipkart.com</title>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8" />
<!--<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> -->
<meta property="fb:page_id" content="102988293558" />
<meta property="fb:admins" content="658873552,1412400758,624500995,100000233612389"/>
<meta name="Keywords" content="professional android 2 application development, buy professional android 2 application development, professional android 2 application development india, professional android 2 application development review, reto meier, 8126525894, 9788126525898" />
<meta name="Description" content="Professional Android 2 Application Development by Reto Meier. Rs.449, Save 25%. Buy Professional Android 2 Application Development, All India Free Home Delivery. 8126525894, 9788126525898 |" />

    <link rel="canonical" href="http://www.flipkart.com/professional-android-2-application-development-8126525894/p/itmdytmwpjzyhade" />
<link rel='shortcut icon' href='http://img5.flixcart.com/www/prod/images/favicon-18354.ico' />................something something..........................


src="http://googleads.g.doubleclick.net/pagead/viewthroughconversion/1017598645/?value=0&amp;label=9tgBCLOv-QIQtaWd5QM&amp;guid=ON&amp;script=0"/>
                </div>
            </noscript></div>

请帮忙。

在$dom变量中加载文档后，可以执行以下操作：

echo htmlspecialchars($dom->saveHTML());

参见saveHTML 手册

我正在使用htmlspecialchars，以便显示html而不是渲染。

这是通过PHP file_get_contents()中的单个函数实现的(http://php.net/file-get-contents)这将以字符串形式返回文件的内容。

// print source to current output
echo file_get_contents( 'http://www.google.com' );
// print content as readble format
echo htmlspecialchars( file_get_contents( 'http://www.google.com' ), ENT_SUBSTITUTE );

如果输入在给定编码中包含无效的代码单元序列，则ENT_SUBSTITUTE-或ENT_IGNORE-标志对于htmlspecialchars()是必要的。看见http://php.net/htmlspecialchars#refsect1-函数.html特殊字符返回值

$dom = new DOMDocument ('1.0');
@$dom->loadHTMLfile ('https://mp3skull.cr');
$thisi=$dom->saveHTML();
echo htmlentities($thisi);

这将打印页面的html源