What is LUA? LUA is a scr ipting language, its power lies in the fact that it can be embedded in your C++ programs. scr ipts give you the possibility to change the behaviour of your C++ programs without any need to recompile your program. A real wor
html5 求助编辑百科名片 HTML5是用于取代1999年所制定的 HTML 4.01 和 XHTML 1.0 标准的 HTML 标准版本,现在仍处于发展阶段,但大部分浏览器已经支持某些 HTML5 技术。HTML 5有两大特点:首先,强化了 Web 网页的表现性能。其次,追加了本地数据库等 Web 应用的功能。广义论及HTML5时,实际指的是包括HTML、CSS和Javascr ipt在内的一套技术组合。它希望能够减少浏览器对于需要插件的丰富性网络应用服务(plug-in-based ri
5款纯div+css制作的弹出菜单(标准且无js) 一、最基本的:二级dropdown弹出菜单 二级dropdown弹出菜单--A CROSS BROWSER DROP DOWN CASCADING VALIDATING MENU /* common styling */ /* set up the overall width of the menu div, the font and the margins */ .menu { font-family: arial, sans-s
2016机器学习暑期学校-强化学习专场-所有PPT,英文介绍如下: The machine learning summer school series was started in 2002 with the motivation to promulgate modern methods of statistical machine learning and inference. It was motivated by the observation that while many stude
YACS 是一个强大的 PHP 脚本,可以让你维护一个动态的 Web 服务器。特性:- Runs on your own server, or on a shared web site- Post articles with web forms, by e-mail, or remotely (w:bloggar)- Embed images and photos in articles --automatic resize- Each section can be a weblog, a d
第三版的英文原文feedback system:An Introduction for Scientists and Engineers SECOND EDITION
Version v3.0i (2018-09-30)
Karl Johan °Astr¨om
Richard M. Murray
注:自己下载拼合而成Contents
Preface to the second edition
Preface to the first edition
X
Chapter 1. Introd
本文实例分析了php中HTTP_REFERER函数用法。分享给大家供大家参考。具体分析如下:
利用php的http_referer函数来判断用户的来路,这是比较简单的,实例代码如下:
复制代码 代码如下:<?php
if (isset($_SERVER[‘HTTP_REFERER’])) {
print “The page you were on previously was {$_SERVER[‘HTTP_REFERER’]}”;
} else {
nav标签全称navigation,顾名思义,是导航的意思。根据HTML5的相关标准定义如下: A section of a page that links to other pages or to parts within the page:a section with navigation links. 中文翻译大概意思是”页面中的一个用来链接到其它页面或者当前页面的区域:一个含有导航链接的区域”。 这里非常清楚的定义了nav标签的功能,这里和header类似并没有指定必须是主导航,也可以是