website design pattern
The most often occurred use case is: user opens a webpage; the webpage reads data from database and displays it to the user; the user modifies some of the data […]
customer fund management system design in shopping websites
A newbie website programmer may thinks it easy to handle the customer’s fund. Consider a buyer buys a goods/service from a seller on your website. Most likely he will handle […]
How to write a php login page?
Some web pages need authentication to access. Only authorized users are allowed to read those pages. For example, wordpress back-end pages are prohibited from accessing by unauthorized visitors(you can refer […]
urlencode and urldecode
Since space is not allowed in a url, the following html is illegal in syntax: <a href=”http://myprogrammingnotes.com/test.php?p=var1 + var2″>click me</a> However, if you open that html in firefox, you will […]
codec of QTextStream
If you use QTextStream to read and write files, sooner or later, you will encounter the codec problem. Interestingly, Qt uses utf-8 string almost anywhere but QTextStream does not use […]
UFT-8 encoding
You may often hear the sentence: a file is UTF-8 encoded. Occasionally, you may want to check if a file is UFT-8 encoded or not. In a UTF-8 encoded text […]
Responsive webpage design using w3.css
Simply speaking, responsive webpage design is laying elements on a web page in different manners for different browser’s sizes using the same piece of html code. For example, on large […]
How to write a Qt .pro file?
Qt project file(.pro file) is used to control the build of projects. I seldom use that because I’m scared by so many mysterious macros. But if you do not want […]
How to use an external lib in Qt project?
To add an external library to Qt project, you should know the answer to the following questions: how to add lib search path in qt project? LIBS += -L d:/dev/externallib/lib […]
How to build Botan using Mingw under Windows?
I downloaded an open source Qt project which uses Botan library. Specifically, the project includes Botan header files in its source files such as: include <botan/pipe.h> And the project links […]