In the history of the development of Web technology, although the emergence of Cookie technology is a major change, Cookie actually saves data on the client's computer, so it has caused a controversy: users have the right to prevent the use of Cookie, so that the Web server cannot pass Cookie to track user information. Session technology stores user-related data under the server system, so users cannot stop using Session. Cookies can be compared to the shopping membership cards that merchants apply for customers when they go to the mall for the first time, and are kept by the customers themselves. If the customer forgets to bring the shopping card when he goes to the mall next time, or loses the shopping card, the user will not be able to use his membership status to shop again. But if the merchant handles the membership card for the customer and the mall saves the membership card, the user does not need to keep the card on himself. However, there are many customers applying for membership cards in shopping malls. When customers
1. How to configure Session in php
Introduction: In the history of Web technology development, although the emergence of Cookie technology is a major change, Cookie actually saves data on the client's computer, so it has caused a controversy: Users have the right to Block the use of cookies so that the web server cannot track user information through cookies.
2. New features of HTML5: File and binary data operations
Introduction: Historically, JavaScript has not been able to handle binary data. If you must process it, you can only use the charCodeAt() method to convert text encoding into binary data byte by byte. Another way is to convert the binary data into Base64 encoding and then process it. Both methods are not only slow, but also error-prone. ECMAScript5 introduced the Blob object, allowing direct manipulation of binary data.
3. Share a detailed analysis of CSS priorities
##Introduction: Before talking about CSS priority, we have to understand what CSS is and what CSS is used for. First, let’s give a brief explanation of CSS: CSS is the abbreviation of Cascading Style Sheets. Its specifications represent a unique stage of development in the history of the Internet. Nowadays, for friends who are engaged in web page production, there should be very few who have not heard of CSS, because in
4. Today in the history of WeChat public platform development
## Introduction: Looking back on the long river of history, history is a mirror of life; taking history as a mirror, we can know the rise and fall; Every day is a mixed bag of joy and sorrow; we can understand the events of this day in history, learn from the past and learn from the present, and history cannot be forgotten. Here you can read the historical stories of each day, what major events happened every day, who was born and died in history, what anniversaries and festivals are celebrated every day, you can easily browse here! Calendar is a simple but important tool in our lives. Just open the calendars of different years and you will find that the arrangement of dates is always the same. We will experience the same day every year, such as New Year's Day or Christmas. , just like when we go out every day, we always pass by the door. On this simple day, in history
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Be careful with the XmlPullParser.netText() methodIntroduction: Using XmlPullParser on Android is a highly efficient and easy-to-maintain method for parsing XML. Android has historically had two implementation classes that implement this interface:
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9 Myths About Java Performance
Introduction: There is something called black magic about Java's performance. Part of the reason is that the Java platform is very complex and in many cases the problem is difficult to locate. However, there is also a historical trend for people to study Java performance based on wisdom and experience, rather than relying on applied statistics and empirical reasoning. In this article, I hope to debunk some of the most ridiculous tech myths. 7. php Find common multiples of consecutive numbers Introduction: Why does 1 hour have 60 minutes, not 100 What about minutes? This is caused by historical habits. But it's not purely accidental: 60 is an excellent number, and it has many factors. In fact, it is a multiple of every number from 1 to 6. That is, 1,2,3,4,5,6 can all divide 60. We hope to find someone who can remove... 8. Sun announced that it has completed the acquisition of the open source database MySQL Introduction: Sun Microsystems announced on Tuesday (February 26) that the company has completed the acquisition of open source software vendor MySQL. Sun Microsystems said the company will make more acquisitions in the future. Sun CEO Jonathan Schwartz said in a press conference on Tuesday: "In my opinion, the acquisition of MySQL is the most important event in the history of the company. 9. Database Technology-Database Naming and Design Specifications Introduction: Database Technology-Database Naming and Design Specifications Database development has historically used a somewhat mysterious system. Naming database tables and fields. Originally a result of database management systems (DBMS), these naming schemes became convention and tradition. However, as database applications became more complex and larger, they became more common. Development team, and for 10. Catch the author of the Nth comment on the website Introduction: Sheng'er is on today I failed to grab the 100th comment in an article, which gave me an idea to crawl the author of the Nth comment in the history of the website. For example, to crawl the author of the 1000th comment, that is, to query the author of the 1000th comment. Who sent it, find out who is this lucky star~ First go to the effect, (inside the white frame is the title content displayed when the mouse is placed on it, you can also go to Little Butterfly's [Related Q&A Recommendations] : php Find the common multiple of consecutive numbers git - How to check the files affected by a merge in sourcetree?
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