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PHP entry-level CODER self-test questions

Note: The full score of this test is 100 points, involving the comprehensive knowledge of WEB (Php direction) and passing the score of 90 points.

BY: PIG 2009.07.14

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I. Basic PHP
1. Explain the differences between echo, print, require, and include. (3 points)
2. Remove duplicate elements in an array in at least two ways. (3 points)

3. Briefly describe the usage and difference of $ _ GET and $ _ POST. (4 points)

4. Try to describe the usage and differences between cookies and sessions, and the relationship between them. (6 points)

5. Exchange Values of two variables without using intermediate variables. (3 points)

6. What is escape? Why escape? (3 points)

7. Construct an array from a to z. (2 points)

8. Explain the usage of the symbol >,=> and $ this, $ that. (3 points)

9. Define an abstract class student, which is then inherited by the sub-class cs and implemented by an abstract method do_homework (). (5 points)

Ii. Foreground WEB Basics

10. Try to explain the difference between class and id. (2 points)

11. Obtain the content of a DIV with the ID as KEY, and add a LI tag to the DIV. The content of the text node is
"I am a li ". (4 points)

12. Use CSS technology to implement horizontal menus. (5 points)

13. How to refresh the parent framework in the subwindow. (2 points)

Iii. Database Basics

14. The code changes the table names of all data tables in the MUSIC database. (5 points)

15. There is a data table containing five fields (cid, ctitle, cbody, cauthor, ctime). All fields of the 40 records after 800,000th records must be retrieved. (4 points)

16. How to store an array object to a field in the data table. (2 points)

17. Compare the advantages and disadvantages of MYISAM and INNODB in MYSQL. (3 points)

18. Try some MYSQL optimization methods. (4 points)

4. Algorithms and others.

19. Is md5 () an encryption algorithm? How can I protect my password from being easily cracked during Member registration? (3 points)

20. Try to explain the idea and code implementation of the "password retrieval" function. (5 points)

21. Sort a small sorted array. (4 points)

22. To create a Public Transit Query site for a city, please design its database structure. (5 points)

23. Construct a regular expression that matches all current mobile phones, including mobile, Unicom, and telecom. (3 points)

24. use regular expressions or other methods to add a comma for a number, such as 32,995,145. (4 points)
25. The UPC code is known, that is, the commodity code we often call. There are 13 digits in total. The first three digits are the Country Code (China is 691,692,693), and the last digit is the check digit. The verification rules are as follows:

Sum = (a1 + 3a2 + a3 + 3a4 +... + An-1)

Sum + check = 0 mod 10. Use the code to implement the verification process. (3 points)

26. Obtain the number of prime numbers smaller than 10 billion and the number of 9-digit prime numbers. (4 points)

27. Understand MVC and its static directory implementation. (6 points)