


Super comprehensive collection of PHP interview questions Page 1/2_PHP Tutorial
1. Use PHP to print out the time of the previous day in the format of 2006-5-10 22:21:21 (2 points)
2. The difference between echo(), print() and print_r() (3 points)
3. Templates that enable HTML and PHP to be used separately (1 point)
4. What tools are used for version control? (1 point)
5. How Implement string flipping? (3 points)
---------------------------------- ----------------------------
6. Methods to optimize MYSQL database. (4 points, the more you write, the more you get)
7. The meaning of PHP (get 1 point)
8. What is the function of MYSQL to get the current time?, and the function of formatting the date is (2 Points)
9. A method to intercept Chinese text strings without garbled characters. (3 points)
---------------------------------------- -----------------------
10. Have you ever used version control software? If so, the name of the version control software you use is ?(1 point)
11. Have you ever used a template engine? If so, what is the name of the template engine you use? (1 point)
12. Please briefly describe what you are most proud of Development work (4 points)
13. What method do you use to solve the traffic problem for a website with large traffic? (4 points)
------- -------------------------------------------------- --------
14. Use PHP to write the code to display the client IP and server IP 1 point)
15. What is the difference between the include and require statements? Why? To avoid including the same file multiple times, use (?) statements to replace them? (2 points)
16. How to modify the survival time of SESSION (1 point).
17. There is a web address , For example, the homepage of the PHP Research Laboratory: http://www.php100.com, how to get its content? ($1 point)
18. In HTTP 1.0, the meaning of status code 401 is (?); If the prompt "File not found" is returned, you can use the header function, whose statement is (?); (2 points)
19. In PHP, heredoc is a special string, and its Is the end mark required? (1 point)
20. Talk about the advantages and disadvantages of asp, php, jsp (1 point)
21. Talk about the understanding of mvc (1 point)
------------------------------------------------ --------------------------
22. Write the SQL of the names of the ten people with the most posts, using the following table: members(id, username, posts, pass, email) (2 points)
23. Please explain the difference between passing values and passing references in PHP. When to pass by value and when to pass by reference? (2 points)
24. What is the function of error_reporting in PHP? (1 point)
25. Please write a function to verify the email Is the format correct (2 points)
26. Briefly describe how to get the current execution script path, including the obtained parameters. (2 points)
27. How to modify the survival time of SESSION. (1 point)
------------------------ -----------------------------------------------
28. What is the pop-up dialog box function of a JS form? What is the function to obtain input focus? (2 points)
29. What is the redirect function of JS? How to introduce an external JS file? (2 points)
30. What is the difference between foo() and @foo()? (1 point)
31. How to declare a class named "myclass" without methods and attributes? (1 Points)
32. How to instantiate an object named "myclass"? (1 point)
33. How do you access and set the properties of a class? (2 points)
34. What is the difference between mysql_fetch_row() and mysql_fetch_array? (1 point)
-------------------------- ---------------------------------------------
35. What is the GD library used for? (1 point)
36. Point out some ways to enter a piece of HTML code in PHP. (1 point)
37. Which of the following functions can open a file for reading and writing? (1 point)
(a) fget() (b) file_open() (c ) fopen() (d) open_file()
38. Which of the following options does not add john to the users array? (1 point)
(a) $users[] = 'john';
(b) array_add($users,'john');
(c) array_push($users,'john');
(d) $users ||= 'john';
39. Will the following program be input? (1 point)
$num = 10;
function multiply(){
$num = $num * 10;
}
multiply ();
echo $num;
?>

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

You should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl


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