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What is the purpose of the controller in MVC? what is the difference between it and the model? I just learned the MVC framework. What I cannot understand is that the controller. what I understand is that the model layer is the processing page of the background, and the view layer is the front-end.

What is the purpose of the controller in MVC? what is the difference between it and the model? I just learned the MVC framework. What I cannot understand is that the controller. what I understand is that the model layer is the processing page of the background, and the view layer is the front-end.

What is the general architecture of e-commerce websites based on lamp and what are the core technologies, such as Xiaomi Mall, jumei youpin and weipinhui? What are the solutions for front-end, backend php logic, data layer, and physical layer, and how to optimize them? Is there any good documentation? What is the gener

Article Description: Do you know what you want to do? What other soft spots are there? Introduction: The original intention of writing this article is to let oneself "read" know. Knowing that it is an attractive product that has even shifted my interest in Weibo, I want to know what the logic behind it is and how it works. Of course, it is possible to

Interview with a company leader in Beijing, not far from the capital, to attract attractive wages and to harm the capital. Interview SharePoint content. Haha, I think people think it's quite a bit of water. The other party asked, "What do you think Sharepoint is? What are the advantages? What are the advantages ?" My answer is a collection of CMS workflow doc

-------------------------------------------------------- Transferred from 36krDo you love or do you love what you do? Passion is not what you follow, but what you follow when you work hard and become valuable to the world. Rare passion It is easy for everyone to confuse interests with passion that can achieve career or business achievements. Cal said, in fact, th

non-relational data storage;Ii. What is the difference between Entity Framework7　　1. What is the same as the previous version?When using it, the top-level interface is basically the same as the previous version,A, you can still inherit the DbContext context object, and still have the dbsetb, you can still write queries using LINQ on the Dbset attribute;C, you can still use the add and remove methods on the

1. What is serialization? This is simply to preserve the state of the various objects in memory and to read the state of the saved objects again. Although you can save object states in a variety of ways, Java provides you with a mechanism that should be better than your own to preserve the state of objects, which is serialization. 2, under what circumstances need to serialize a) when you want to save the me

C # What is the keyword var, and under what circumstances, Starting from. NET 3.0, you can use the var keyword to declare local variables within the method. What is the var keyword? Under what circumstances? □Var keyword is used to implicitly declare a data type. The variable type is determined during compilation rath

Web crawler is a program, mainly used in search engines, it will be a site of all the content and links to read, and establish the relevant full-text index into the database, and then jump to another site. Looks like a big spider.When people search for keywords on the web (such as Google), it is actually better than the content in the database to identify the user. The quality of the Web crawler determines the ability of the search engine, such as Google's search engine is obviously better than

by a function that can be used freely outside the lexical environment after the variables created are referenced. （ https:// Secure.wikimedia.org/wi kipedia/zh/w/index.php?title=%e9%97%ad%e5%8c%85_%28%e8%ae%a1%e7%ae%97%e6%9c%ba%e7%a7%91%e5%ad%a6%29 VARIANT=ZH-CN ） Closures are often used to create internal variables so that they cannot be arbitrarily modified externally and can be manipulated by a specified function interface. What is a clo

What is ddns? What is the purpose? How to Use nat123 dynamic domain name resolution ?, Ddnsnat123 What is ddns? What is the purpose? How to Use nat123 dynamic domain name resolution? Ddns is dynamic domain name resolutionTo solve the problem of dynamic public IP address and obtain real-time public IP address informa

What is the role of the hook function in thinkphp? What business logic is generally used for processing? Reply content: What is the role of the hook function in thinkphp? What business logic is generally used for processing? A hook is like a mount point that hangs on a function. When this mount point is encount

explain it to a six-year-old, you really don't understand it yourself. Body Previously: There is a princess ...... function princess() {The closure is a lexical scope created by the function. after the variables created in the closure are referenced, they can be freely used outside the lexical environment. (Https://secure.wikimedia.org/wikipedia/zh/w/index.php? Title = % E9 % 97% AD % E5 % 8C % 85 _ % 28% E8 % AE % A1 % E7 % AE % 97% E6 % 9C % BA % E7 % A7 % 91% E5 % AD % A6 % 29 vari

What is the role of Doctype? What are the differences between standard (strict) and weird (mixed) modes ?, Doctype HybridWhat is the role of Doctype? What are the differences between standard (strict) and weird (mixed) modes?The following standard mode and strict mode are collectively referred to as standard mode, while the weird mode and mixed mode are collectiv

One. What Ajax is: 1. With asynchronous mode, the user experience is improved by 2. Optimizes the transfer between browser and server, reduces unnecessary data round-trip, and reduces bandwidth consumption by 3. Ajax runs on the client side, assuming some of the work that would otherwise have been done by the server, reducing the load on the server under a large user volume. The biggest features of ajax: 1. Ajax can implement dynamic non-flush (partia

, there are already a lot of related articles on the network, which are not mentioned here, only from the system startup principle. UEFI is more powerful than the BIOS because UEFI itself is already the equivalent of a micro operating system, and its convenience is:First, UEFI already has file system support, it can directly read the files in the FAT partition; What is a file system? Simply put, the file system is the operating system organiz

"What is missing in China and what is missing in Japan"--KandoWhat China lacks:1. High-quality service2. A coherent spirit of solidarity3. Delicate technologyWhat Japan lacks:1. Responsibility2. The power of the young3. A broad World VisionChina's enterprises are full of vitality, but the mobility of personnel is not conducive to the accumulation of technology enterprises.There is no patience in doing thing

What does @ Mean? $ dims nbsp ;= nbsp; @ getimagesize ($ image) what does @ Mean? what does @ mean? $ Dims = @ getimagesize ($ image) What does @ In the middle mean? share it: ------ Solution -------------------- The error message should be blocked. Despite blocking, the error is still ------ Solution ---------

3000 and greater than 1500 Select * fromEmpwhereSalbetween 1501 and 2999--(Your salary didn't send a few cents in it) Select * fromEmpwhereSal the andSal> the; --4. Inquire about all employees who are not paid between 1500 and 3000 (including the conditions themselves) Select * fromEmpwhereSal not between the and the Order bySal; Select * fromEmpwhereSal the orSal> the Order bySal; /*Note: Between gets data results that contain its own condition not between g