Organize and collect a set of written test questions for PHP senior engineers_PHP Tutorial

I have compiled a written test question for a senior PHP engineer. The questions are very comprehensive. Well, basically if you answer these questions well, then you should be qualified for PHP positions in most Internet companies. Let’s get straight to the topic.

1. Basic knowledge points

1. The meanings of several status codes in the HTTP protocol: 503,500,401,200,301,302. . .
2. The difference between include, require, include_once, and require_once.
3. The evolutionary history of several versions of PHP/Mysql, such as major improvements from mysql4.0 to 4.1, PHP 4.x to 5.1, etc.
4. HEREDOC introduction.
5. Write some php magic methods.
6. Some configure parameters when compiling php.
7. Two ways to pass parameters to php.
8. (mysql) Please write the meaning of data type (int char varchar datetime text); What is the difference between varchar and char;
9. Used by debugging functions such as error_reporting.
10. Have you ever used version control software? If so, what is the name of the version control software you used?
11. The difference between posix and perl standard regular expressions.
12. Which areas are restricted after Safe_mode is turned on?
13. Write code to solve the problem of multiple processes/threads reading and writing a file at the same time.
14. Write a piece of code to upload files.
15. Mysql storage engine, the difference between myisam and innodb.

2. Web architecture, security, project experience

1. Introducing the experience of using xdebug, apc, eAccelerator, Xcache, Zend opt.
2. Use mod_rewrite, when there is no physical file /archivers/567.html on the server, redirect to index.php?id=567, please turn on mod_rewrite first.
3. The MySQL database is used as the storage for the publishing system. More than 50,000 entries are added per day. The operation and maintenance is expected to last three years. How to optimize it?
4. Write a sorting algorithm (principle) and tell how to optimize it.
5. Please briefly describe your most proud development work
6. For websites with large traffic, what method do you use to solve the problem of statistics of page visits
7. Have you ever used a template engine? If so, what is the name of the template engine you used?
8. Please introduce the principle of Session. What should we pay attention to in terms of Session in large websites?
9. Tools to test PHP performance and MySQL database performance, and methods to find bottlenecks.
10. Regularly proposes all links in a web page.
11. Introducing the principles of common SSO (single sign-on) solutions (such as dedecms integrating discuz's passport).
12. The characteristics of the PHP framework you have written, what problems it mainly solves, and its differences from other frameworks.
13. What are the differences in performance optimization between large forums/news article systems/SNS websites?
14. Photo album applications: It is required that multiple files can be selected and uploaded at the same time in the browser, pictures must be cropped, and the compressed package must be decompressed on the server side. Can upload a single file up to 50M. A progress bar is displayed during the upload process. Thumbnails of four sizes can be generated for each picture, and the video files must be converted into flv for flash playback. Describe the various types of open source software to be covered and their simple uses.
15. A group of monkeys line up in a circle and are numbered according to 1, 2,..., n. Then start counting from the 1st one, count to the mth one, kick it out of the circle, start counting from behind it, count to the mth one, kick it out..., and continue in this way until the end. Until there is only one monkey left, that monkey is called the king. Programming is required to simulate this process, input m, n, and output the number of the last king. Use a program to simulate this process.

3. Basic use of unix/linux

1. Some methods to check the current system load information under Linux.
2. Basic shortcut keys for vim.
3. SSH security enhancement method; configuration of password mode and rsa key mode.
4. rpm/apt/yum/ports Basic commands for package installation, query and deletion.
5. The basic format of Makefile, gcc compilation and connection commands, the difference between -O0 and -O3.
6. Basic use of gdb, strace, valgrind.

4. Front-end, HTML, JS

1. css box model.
2. Prototype in javascript.
3. The scope of this object in JavaScript.
4. The difference in event bubbling between IE and Firefox.
5. What are weird mode, standard mode, and near-standard mode.
6. Definition of DTD
7. Common hacks for IE/firefox.
8. firefox, front-end js/css debugging tool under IE.

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