如何从网页获取源代码? [英] How do I get source code from a webpage?

问题描述

如何从php和/或javascript网页中获取网页的源代码?

How can we get the source code of a webpage from a webpage in php and/or javascript?

推荐答案

感谢:

• @PLB
• @阴影向导
• 获取iframe的源代码
• http://www.frihost.com/forums/vt-32602.html
• @马特·科夫林(Matt Coughlin).

首先，您必须知道，您将永远无法获得与Javascript页面不在同一域中的页面的源代码.(请参见 http://en.wikipedia.org/wiki/Same_origin_policy ).

First, you must know that you will never be able to get the source code of a page that is not on the same domain as your page in javascript. (See http://en.wikipedia.org/wiki/Same_origin_policy).

file_get_contents($theUrl);

在javascript中，有三种方法:

首先，通过XMLHttpRequest: http://jsfiddle.net/635YY/1/

var url="../635YY",xmlhttp;//Remember, same domain
if("XMLHttpRequest" in window)xmlhttp=new XMLHttpRequest();
if("ActiveXObject" in window)xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
xmlhttp.open('GET',url,true);
xmlhttp.onreadystatechange=function()
{
    if(xmlhttp.readyState==4)alert(xmlhttp.responseText);
};
xmlhttp.send(null);

其次，通过iFrame: http://jsfiddle.net/XYjuX/1/

var url="../XYjuX";//Remember, same domain
var iframe=document.createElement("iframe");
iframe.onload=function()
{
    alert(iframe.contentWindow.document.body.innerHTML);
}
iframe.src=url;
iframe.style.display="none";
document.body.appendChild(iframe);

第三，由jQuery : http://jsfiddle.net/edggD/2/

$.get('../edggD',function(data)//Remember, same domain
{
    alert(data);
});

这篇关于如何从网页获取源代码?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！