PHP programmers break through growth bottlenecks-with learning suggestions

There are a few people around to do PHP development, because the interview, also exposed to a lot of PHP engineers, they often doubt their future in the technical growth and development, I often give them some advice, I hope they can break themselves, have better development. PHP engineers face the bottleneck of growth first clear I refer to the PHP project, refers to the graduation work, mainly in PHP web system development, no other language work. Work experience in about 3-4 years, ordinary Web system (millions access, level 1000 data or business logic is not particularly complex) development of basic handy, no problem. But they would have something like this: except that PHP doesn't use any other language, it might point to a shell script. The mastery of PHP is not fine (many PHP manuals are not read, except the library) knowledge is relatively narrow (in the face of demand, except the use of PHP and MySQL, do not know other solutions) PHP code to process-oriented, the realization of object-orientated implementation too around, do not understand these phper in the face of the need for high performance, When dealing with high concurrency, large amounts of data in a project or business logic is more complex (the system needs to solve the problem of multi-domain business), the lack of ideas. Can not analyze the nature of the problem, technical judgment is poor, the problem can find a temporary solution, but often in the temporary solution, the system and their own step by step toward collapse. So how do you improve yourself? How can you challenge a more demanding system? Where is the higher challenge? In combination with my own experience, I have listed some specific challenges so that we can first have a perceptual understanding. Where are the challenges of high-performance systems? How do I select a Web server? Do you want to use the fast-cgi mode instead of using the reverse proxy service? Select Full memory cache or hard disk cache? Do you need load balancing? Is it based on the application layer or the network layer? How to guarantee high reliability? How is your PHP code performing, and what happens after you use the optimizer tool? Where are the performance bottlenecks? Do you need to write a C extension? What are the characteristics of user access, read more or write more? Do you need read/write separations? How is data stored? What is the write speed and readout speed? How does data increase access speed read change? How do I use caching? How to consider failure? How is data consistency guaranteed? Where are the challenges of high complexity systems? Can you identify the areas that your business corresponds to? Is it one or more? Can the business be reasonably abstracted, and the changes in business rules can be achieved at a very small cost? Data consistency, security can be guaranteed? Whether to hold the method of object-oriented analysis and design when I have listed the questions you can certainly answer, I think technically you may have become an architect. How you can not yet answer, you need to strengthen in the following several directions. How to improve, break through the bottleneck how you can not answer, you need to strengthen in the following direction: Analysis of the technology you use the principle and the mechanism behind it, so as to improve your technical judgment, improve the correctness of your technical options; Learn important knowledge during universityKnowledge, operating system principles, data structures and algorithms. Know that you used to study for exams, but now you need to learn for yourself, let yourself know why. Start learning C again, although you've already learned it in college. This is not just because you may need to write a PHP extension, but also because, in the application of C, there is an environment that is concerned with performance, memory control, variable life cycles, data structures, and algorithms. Learning object-oriented analysis and design, it is an effective way to solve complex problems. Learning abstraction is the only way to solve complex problems. "How long will it take to learn so much stuff?" If you work hard, there is better planning, estimated to take 1-2 years, how to learn the problem, we follow up again. (Note: The following are the learning methods shared by the original author Zuo Wenjian). Learning how to teach effectively is a big problem. Some of their own practice but very fragmented, not good summary. Before going to bed last night, I suddenly thought of the core of RUP, "architecture-centric, use-case-driven, iterative development", to borrow this idea, on effective learning methods, can be expressed as follows: the principle, model or mechanism as the center, task-driven, iterative learning a little abstract, give an example to illustrate how to learn. Objective: To learn how to improve processing performance. An iterative-driven task: Locate the region by IP. This is a common task for Web applications, and the IP database is a record of around 10 mangyo. First iteration: Implementing functionality without regard to performance (via PHP) because it is not possible to find a region directly through key (IP), it is not easy to put it directly into the data or through associative arrays. The idea is to sort the data first and then look for 1. How do I find through IP? Ordered data, binary lookup is the fastest. 2. How to sort? Using the library function sort of course is OK, but that is learning, it is to achieve a quick sort of it yourself. Learning objectives: Sorting algorithm, find algorithm phper data structure and algorithm foundation is poor, peacetime also do not have this aspect of task, oneself also do not study, therefore this aspect of knowledge is very lack. However, the problem of programming solves eventually comes down to the data structure and algorithms for manipulating this data structure. If the data structure algorithm is often in the mind, then the problem can be clearly recognized its internal structure, the solution will naturally arise. Second iteration: Optimizing the loading and sequencing of data if you do the first step, it's basically not available because the data needs to be loaded and sorted every time, so it's too time-consuming. The idea is that once the data is loaded and sorted, it is placed in a place where every PHP process can access it. Put it in memcache it's easy for everyone to think of. In fact, in the shared memory (EA and other accelerators are supported) is a faster way, because memcache more network operations. How do you test performance when the data is put into shared memory or chunked? How to analyze the bottleneck (xdebug)? In these questionsYou will learn the learning goals: how to detect, locate, and optimize PHP performance; The impact of PHP implementation structure on performance. The third iteration: Writing PHP's extended performance or not, have to enter the world of C + +, but you will not only phper and the service of all-round engineers, of course, this has not done the C/S students challenge is huge. I can no longer simply say how to learn C + +, see the "PHP Programmer learning C + +" Learning Goal: C + + learning, how to write the PHP extension to determine the need to learn the mechanism and principles? How to find the driving learning task? I have no concept of what needs to be learned, how to answer the above two questions? From the positioning of this technology to find out the need to learn the focus, that is how it does (the mechanism) and why it can do so (model or principle) list the most common application of this technology, as a learning task, from simple to difficult to practice. If I need to learn JavaScript, I have a little perceptual knowledge of html,css first I learned that JS is the dynamic language of the web, mainly to solve the dynamic interaction of web pages. The main points I want to learn are as follows: How JS interacts with HTML (mechanism) what is the difference between JS's dynamic features and other dynamic languages? (language model) If you are fully self-taught, find the key points (mechanisms, models, principles) that you need to learn to set up a learning task is really not so easy to grasp. If you find an experienced person to guide you or add a learning team, the speed of learning will certainly be greatly improved. Finally, I want to say is: PHP because of the simple and use, but not because of its simplicity and limit our growth! Free to receive the Lamp Brothers and original PHP tutorial CD/"Detailed PHP" Essentials Edition, details of the website customer service: Http://www.lampbrother.netPHPCMS two times development http://yun.itxdl.cn/online/phpcms /index.php?u=5 Development of HTTP://YUN.ITXDL.CN/ONLINE/WEIXIN/INDEX.PHP?U=5 Mobile Internet server-side development http://yun.itxdl.cn/online/server/ Index.php?u=5javascript Course Http://yun.itxdl.cn/online/js/index.php?u=5CTO Training Camp http://yun.itxdl.cn/online/cto/ Index.php?u=5

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