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PHP, the difference between a cookie and a session, what are the benefits of using it? (ask you to answer, do not Baidu, thank you)?

Reply content:Instead of talking about the session and cookie in PHP, let's look at what the session and cookie are in the normal web. Cookies are actually technology at the end of the browser. Since HTTP itself is stateless, it is generally not known to the server side who each request is, so a Web session allows tem

For a summary of the regular expression g and M parameters, in order to answer "/g" in "Regular Expression (/[^ 0-9]/g,"), what does it mean ?"

What does "/g" in the regular expression (/[^ 0-9]/g, '') mean ?" This problem also aims to make it easier for you to have a more comprehensive and profound understanding of regular expressions. I will give a systematic summary of some key points and easily confused points. Conclusion 1: The attachment parameter G usage After the expression is added with the parameter G, it indicates that global matching ca

For a summary of the regular expression g and M parameters, in order to answer "/g" in "Regular Expression (/[^ 0-9]/g,"), what does it mean ?"

What does "/g" in the regular expression (/[^ 0-9]/g, '') mean ?" This problem also aims to make it easier for you to have a more comprehensive and profound understanding of regular expressions. I will give a systematic summary of some key points and easily confused points. Conclusion 1: The attachment parameter G usage After the expression is added with the parameter G, it indicates that global matchi

To help a very simple ACM problem Java code on their own computer test is correct, but the submission is always wrong answer first thank you

System.out.println ("Triangle #" + temp);System.out.println (No);Continue} else {A = MATH.SQRT (result);System.out.println ("Triangle #" + temp);System.out.println ("a =" + Df.format (a));}}if (b = =-1) {result = c * c-a * A;If (Result System.out.println ("Triangle #" + temp);System.out.println (No);Continue} else {b = math.sqrt (result);System.out.println ("Triangle #" + temp);System.out.println ("b =" + Df.format (b));}}if (c = =-1) {if (a System.out.println ("Triangle #" + temp);System.out.p

Heap sort: What is a heap? What is the biggest heap? What is a binary heap? What is the heap sorting algorithm? How does php implement heap sequencing?

This document tags: heap sort php php algorithm heap sorting algorithm two fork heap data structure /c12> REST server What is a heapHere the heap (binary heap), refers to not the stack of the heap, but a data structure.The heap can be regarded as a complete two-fork tree, and an "excellent" property of a complete binary tree is that each layer

This is the most wonderful answer I've ever seen.

Perhaps I have not seen the world, but it is I have seen the right "how to become a good programmer, rather than a good code farm?" "Most wonderful answer" copy and paste All "In fact, my heart has been because of the work of the current "food service" and shaken, and suddenly want to learn the site, suddenly C language Foundation, suddenly C # suddenly Java Android direction, but when read this question an

Don Norman: simple is not the answer

Simple is not the answer Author: Don Norman Translator: Ark K] [n g of a r k [Statement] Translated from Don Norman On its personal website The article "Simplicity is not the answer ", Translated and published with the consent of the original author. Original URL: http://jnd.org/dn.mss/simplicity_is_not_the_an

What is an IOC container? What is the use? What is facade? What is the use?

What is an IOC container? What is the use? What is facade? What is the use of IOC containers? What

Enter the answer to the question to check how the content is safer?

In such a form, the requirement is that the content can be viewed only when the question is answered correctly. If you access the form again within one day, you do not need to answer the question. What is the common feasible method? The current practice

The second in the Martian proverb series: the person who asks the question is responsible for finding the answer.

questions actively think about the answer and learn the answer from the answer, rather than passively waiting for the answer.Scenario 2 The consultant came to the company to provide consultation on process improvement. Do you often hear such a Q A process: Q: "How can I estimate agility ?" A: "multiple people should make an estimation together ". Q: "Our in

Linux Basic Competency Test, fluent answer is true.

Tags: basic MasteryLinux Basic Competency Test, fluent answer is true. At least one root partition must be required to install Linxu : Swap is required when the root partition is not large enough Why is t

Water is not a normal military impermanence-why should the architecture be stuck in the form? Answer questions from Zhao Jun

concern of this programmer. Of course, the Code he writes does not need to be concerned about, he only needs to follow the business logic. In addition, as a programmer of data access code, he only cares about what data the programmer needs and what data he provides. He does not need to care about what the data has been taken and how it will be displayed on the

This is my first interview today. I cannot answer many questions. please advise me.

I went to the interview for the first time today. I couldn't answer many questions. please advise me to go to the interview for the first time. I found many of them are different from textbooks. 3. What about hibernate? 8. Are you familiar with the configuration of the James server? How many docs commands do you remember? (Project) 11. how can I turn to PHP for java development? 14.

Why is optimistic lock efficiency higher than pessimistic lock? (Turn, the article did not give a satisfactory answer)

Add by Zhj: This question did not give a satisfactory answer at the end, I have the same confusion with the questioner. Also, see mysql transaction isolation level, lockWhy is optimistic locking more efficient than pessimistic lock?Title: "The Collection" Why optimistic locking efficiency is higher than pessimistic lock? Sending station: Drink from (May 19, 2008

[Turn] Answer--python Django is very confused how to do?

me to launch the second ' man-written ' one. It means that no matter how trendy and tall the language may seem, it must first follow the principle of the first one. And if, in the course of using it, some of the sensory functions, methods, and logic that violate the first are found. So the logic of this function method is just a man-made wrapper. Go to the documentation and don't get tangled up about why the author might have had a head dive and not

Question and answer platform is to increase the quality of the site to stabilize the chain of choice

With the increasingly popular SEO, more and more webmaster see the advantages of the question and answer platform, the question and answer platform has become almost every day the individual stationmaster must go place. But because there are too many people to do, so now the outside chain of question and answer platform becomes more difficult to add. Today we are

Classic judgment database connection disconnection problem, many times there is no answer.

Classic judgment database connection disconnection problem, many times there is no answer. Delphi/Windows SDK/API Http://www.delphi2007.net/DelphiDB/html/delphi_20061215202145283.html When the program is connected normally, the database connection may be abnormally disconnected due to reasons such as server restart or network disconnection. In this case, both ADO

Baidu socialization question and answer launch for website optimization is an opportunity or a challenge

Recently saw such a report, Baidu know the release of the bulletin said its plate knowledge of the head plate to stop the update, close the entrance. According to the analysis, the move is to Baidu's new socialization to answer the product Baidu knowledge of the introduction, relatively knowledgeable answer will be more professional and detailed, non-Baidu know t

Tang Jun: I am interviewing each employee and answer two questions. Your salary is over 100%.

sum up my interview experience into three questions. If the subject answers a correct question, he can get a job. If yes, his salary is 100% higher than that of others, to answer the three correct questions, he can open his own salary. The interviewer can use all resources to answer the questions. During interviews, most companies need to mine the interviewer's

Chicken or eggs first, of course there is an answer

A chicken or an egg is an ambiguous question. In fact, there is a clear answer. First, the world view, and then the definition. This boring question has a strong sense of sophistry in ancient Greek philosophy. I remember that when I took the Chinese reading test, I asked you what you thought ......, I think

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