


HTTP Header referer mainly tells people where I come from, that is, which page I come from. It can be used to count the source of users who visit this website, and can also be used to prevent hot links. The best way to obtain this thing is js. If you obtain it on the server side (PHP method such as: $_SERVER['HTTP_REFERER']), it is unreliable. People can forge it. It is best to use js. It is difficult for people to forge it.
Method: Use the document.referer method of js to accurately determine the true origin of the web page. Currently, Baidu statistics, Google ads statistics, and CNZZ statistics all use this method. Anti-hotlinking is also very simple. If the source URL is judged in js and it is not from this site, the picture will not be displayed.
As we all know, we web developers hate IE because IE does not support standards and its default behavior outside of standards is often inconsistent with other browsers:
Use javascript to make a jump in IE, for example, use window.location.href = ""; If Google uses document.referrer, it cannot get the HTTP referrer requested by the browser because IE has cleared it
The other mainstream browsers Firefox and Chrome will retain the referrer. There is no way, this means that IE will enjoy "ministerial" special treatment again:
The following code can solve this problem in IE:
//Detect if it is an IE browser, then manually add a referer
The principle is to secretly add a link to the IE browser page, and then automatically click on the link, so the referrer can be retained.
var url = 'http://www.jb51.net';
if (/MSIE (d .d );/.test(navigator.userAgent) || /MSIE(d .d );/.test(navigator.userAgent))
{
var referLink = document.createElement('a');
referLink.href = url;
Document.body.appendChild(referLink);
referLink.click();
}
else
{
Location.href = url;
}

如何使用JS和百度地图实现地图平移功能百度地图是一款广泛使用的地图服务平台,在Web开发中经常用于展示地理信息、定位等功能。本文将介绍如何使用JS和百度地图API实现地图平移功能,并提供具体的代码示例。一、准备工作使用百度地图API前,首先需要在百度地图开放平台(http://lbsyun.baidu.com/)上申请一个开发者账号,并创建一个应用。创建完成

js字符串转数组的方法:1、使用“split()”方法,可以根据指定的分隔符将字符串分割成数组元素;2、使用“Array.from()”方法,可以将可迭代对象或类数组对象转换成真正的数组;3、使用for循环遍历,将每个字符依次添加到数组中;4、使用“Array.split()”方法,通过调用“Array.prototype.forEach()”将一个字符串拆分成数组的快捷方式。

如何使用JS和百度地图实现地图热力图功能简介:随着互联网和移动设备的迅速发展,地图成为了一种普遍的应用场景。而热力图作为一种可视化的展示方式,能够帮助我们更直观地了解数据的分布情况。本文将介绍如何使用JS和百度地图API来实现地图热力图的功能,并提供具体的代码示例。准备工作:在开始之前,你需要准备以下事项:一个百度开发者账号,并创建一个应用,获取到相应的AP

js中new操作符做了:1、创建一个空对象,这个新对象将成为函数的实例;2、将新对象的原型链接到构造函数的原型对象,这样新对象就可以访问构造函数原型对象中定义的属性和方法;3、将构造函数的作用域赋给新对象,这样新对象就可以通过this关键字来引用构造函数中的属性和方法;4、执行构造函数中的代码,构造函数中的代码将用于初始化新对象的属性和方法;5、如果构造函数中没有返回等等。

如果服务器的图片被别的网站盗链,将影响服务器的带宽以及访问速度,这时我们就需要设置图片文件或视频文件的防盗链功能;防盗链功能,简单来说就是你可以直接访问该资源,但是不能将我的资源链接放到你自己的服务器上让别人访问,尤其是图片或视频这种比较大的文件,容易导致服务器响应很慢。如果不是图床,还真怕别的网站直接使用本站图片。这样子流量很可能一下子就被刷光了,毕竟cdn都是白花花的银子买来的。因此,还是设置一个防盗链吧,nginx就可以完成这个功能了。一般来说,遵照http协议实现的浏览器,在从a网站访问

这篇文章主要为大家详细介绍了js实现打字小游戏,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下。

php在特定情况下可以读js内部的数组。其方法是:1、在JavaScript中,创建一个包含需要传递给PHP的数组的变量;2、使用Ajax技术将该数组发送给PHP脚本。可以使用原生的JavaScript代码或者使用基于Ajax的JavaScript库如jQuery等;3、在PHP脚本中,接收传递过来的数组数据,并进行相应的处理即可。

本文给大家介绍有关PHP做防盗链的问题,主要内容是讲解Referer原理与图片防盗链实现方法,希望对需要的朋友有所帮助~


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