PHP knowledge Quiz. 63 Interview questions

Опубликовано: 29 Март 2025
на канале: IT Secrets

PHP knowledge questions that many programmers have to answer at interviews. Even experienced developers fail it. Check your level and write in the comments if it was difficult for you.

#php #test #quiz #interview
Questions in this quiz:

01. What does PHP stand for? - 0:40
02. Which of the following is the correct way to start a PHP block? - 1:08
03. What is the function of the 'echo' statement in PHP? - 1:35
04. How do you concatenate two strings in PHP? - 2:03
05. What is the purpose of the 'include' statement in PHP? - 2:28
06. Which superglobal variable is used to access form data after submitting an HTML form with the 'post' method? - 2:59
07. What is the purpose of the 'unset' function in PHP? - 3:29
08. How can you prevent SQL injection in PHP? - 3:58
09. What is the difference between '=='' and '===' in PHP? - 4:27
10. How do you access the length of an array in PHP? - 5:01
11. Which function is used to open a file for writing in PHP? - 5:29
12. In PHP, how can you check if a file exists? - 5:57
13. What is the purpose of the 'header' function in PHP? - 6:25
14. Which magic constant is used to get the current file name in PHP? - 6:56
15. What is the purpose of the 'mysqli_connect' function in PHP? - 7:24
16. How do you define a constant in PHP? - 7:56
17. What is the purpose of the 'session_start' function in PHP? - 8:25
18. How do you redirect a user to another page in PHP? - 8:56
19. Which of the following is used to create an object in PHP? - 9:27
20. What is the purpose of the 'array_merge' function in PHP? - 9:54
21. How do you declare a variable in PHP? - 10:30
22. Which of the following is a valid way to comment out a single line in PHP? - 10:59
23. What does the 'json_encode' function do in PHP? - 11:37
24. Which of the following is used to execute a prepared statement in PHP? - 12:06
25. What is the purpose of the 'array_push' function in PHP? - 12:33
26. Which of the following is true about the 'foreach' loop in PHP? - 13:12
27. What is the purpose of the 'trim' function in PHP? - 13:50
28. How do you check if a variable is an array in PHP? - 14:28
29. What is the purpose of the 'exit' function in PHP? - 14:57
30. How do you declare a static method in a PHP class? - 15:33
31. What is the purpose of the 'file_get_contents' function in PHP? - 16:07
32. What is the purpose of the 'array_key_exists' function in PHP? - 16:40
33. What is the purpose of the 'ob_start' function in PHP? - 17:18
34. How do you declare a constant array in PHP? - 17:48
35. What is the purpose of the 'implode' function in PHP? - 18:21
36. Which function is used to close a MySQL database connection in PHP? - 18:56
37. What is the purpose of the 'array_reverse' function in PHP? - 19:24
38. What is the default file extension for PHP files? - 20:02
39. How do you comment in PHP? - 20:28
40. Which function is used to connect to a MySQL database in PHP? - 21:00
41. What does the 'echo' function do in PHP? - 21:29
42. Which superglobal variable is used to collect form data after submitting an HTML form? - 22:01
43. Which of the following is used to declare a constant in PHP? - 22:31
44. How can you redirect the user to another page in PHP? - 22:59
45. Which of the following is used to start a session in PHP? - 23:29
46. How can you check if a variable is an array in PHP? - 23:56
47. What is the purpose of the 'count' function in PHP? - 24:26
48. What does the acronym PDO stand for in PHP? - 25:06
49. How do you declare a class in PHP? - 25:34
50. What is the purpose of the 'static' keyword in PHP? - 26:04
51. How can you upload a file in PHP? - 26:44
52. What is the purpose of the 'json_encode' function in PHP? - 27:14
53. Which of the following is used to handle errors in PHP? - 27:54
54. What is the purpose of the 'namespace' keyword in PHP? - 28:20
55. How can you check if a function exists in PHP? - 28:56
56. Which of the following is used to fetch the current date and time in PHP? - 29:23
57. What is the purpose of the 'trait' keyword in PHP? - 29:54
58. How can you convert a string to uppercase in PHP? - 30:33
59. How can you delete a cookie in PHP? - 31:00
60. How can you define a constant in a class in PHP? - 31:30
61. How can you prevent cross-site scripting (XSS) attacks in PHP? - 32:02
62. What is the purpose of the 'session_destroy' function in PHP? - 32:35
63. How can you get the length of a string in PHP? - 33:06