PHP MCQ Questions Answers

1. The metacharacter, ____, specifies an anchor at the end of the line.

2. The command _______ :users somefile.txt changes the group affiliation of somefile.txt to users.

3. Which function can you use in error handling to stop the execution of a script and is equivalent to exit()?

4. Which are types of control structures in PHP?

5. Which loop displays all numbers from 1 to 10 inclusive?

6. You want to find out what day Twelfth Night falls on after Christmas 2018. Which code should you use?

7. Assume that $r is 255, and $g and $b are both 0. What is the correct code to output "#ff0000"?

8. You want to use wildcard characters when searching for records in a MySQL/MariaDB database using a PDO prepared statement. Which code should you use?

9. Why is it not recommended to make all of a class's variables public?

10. Which two functions can sanitize text and validate text formats?

11. What are some of the main types of errors in PHP?

12. Your site must allow uploading of large files. What might you need to do?

13. Which code will return the IP address of the client?

14. DRY (Don't Repeat Yourself) is a principle of software development aimed at reducing repetition of software patterns. Which choice is not a way to write DRYer code with PHP?

15. Which superglobal variable holds information about headers, paths, and script locations?

16. What type of computer language is PHP?

17. Which is the most complete list of data types that PHP supports?

18. In PHP 7, What is the correct way to import multiple classes from namespace in a single declaration ?!

19. Imagine a web application, built following a MVC architecture, that contains a quiz and a button to score it, When the user presses the Score button, which component should handle the request?

20. Which is not a valid magic constant?

21. Where is PHP code executed?

22. Which command will extract the domain suffix ("com") from the string $string = "https://cat-bounce.com";?

23. Which PHP variable name is invalid?

24. What are getters and setters?

25. Why should you follow a PSR standard?

26. You are using the following code to decide if a button is clicked, but it is never returning true. Which step is most likely to shed light on the problem? isset($_POST['submit'])

27. If you want to pass a formfield to another page when a button is clicked, you should use the ** . If you want to store information across multiple pages, you should use the ** ?

28. When it comes to the value of a variable, what is the difference between NULL and empty?

29. Assuming that $first_name and $family_name are valid strings, which statement is invalid?

30. A PDO object called $db has been set up to use for database operations, including user authentication. All user-related properties are set. The script line public function __construct(&$db) shows a constructor that initializes all user-related properties to _ if no user has logged in. These parameters will be properly set by the login functions when a user logs in.

31. Why does this code trigger an error?

32. What is the job of the controller as a component in MVC?

33. What is the value of $result in this calculation? $result = 25 % 6;

34. You want to list the modules available in your PHP installation. What command should you run?

35. The php not operator is !. Given the snippet, is there an out put and what is it?

36. Which php control structure is used inside a loop to skip the rest of the current loops code and go back to the start of the loop for the next iteration

37. What is the cause of 'Cannot modify header information - headers already sent'?

38. Which code would you use to print all the elements in an array called $cupcakes?

39. You are using the following code to find a users band, but it is returning false. Which step(s) would solve the problem? isset ($_GET['fav_band'])

40. Both self and this are keywords that can be used to refer to member variables of an enclosing class. The difference is that $this->member should be used for ** members and self::$member should be used for ** members.

41. Your php page is unexpectedly rendering as totally blank. Which step will shed light on the problem?

42. Both triple === and double == can be used to ** variables in php. If you want to hear that string "33" and the number 33 are equal, you would use ** . If you want to check if an array contains a particular string value at a particular index, you would use _

43. Assuming the Horse class exists, which is a valid example of inheritance in PHP?

44. Which operator would you use to find the remainder after division?

45. What displays in a browser when the following code is written?

46. Which line could you NOT use to comment out "Space: the final frontier"?

47. How might you troubleshoot a "call to undefined function" error?

48. The ignore_user_abort( ) function sets whether a client disconnect should abort a script execution. In what scenario would you, as a web developer, use this function?

49. PHP supports multiple types of loops. If you wanted to loop through a block of code if and as long a specified condition is true, which type of loop would you use?

50. Which is the correct format for adding a comment to a PHP script?

51. Which code snippet uses the correct syntax for creating an instance of the Pet class?

52. What is the purpose of adding a lowercase "u" as a modifier after the final delimiter in a Perl-compatible regular expression?

53. What is the value of $total in this calculation?$total = 2 + 5 * 20 - 6 / 3

54. Which value equates to true?

55. Which are valid PHP error handling keywords?

56. The ** operator is useful for sorting operations. It compares two values and returns an integer less than, equal to, or greater than 0 depending on whether the value on the ** is less than, equal to, or greater than the other.

57. What is a key difference between GET and POST?

58. All variables in PHP start with which symbol?

59. N a conditional statement, you want to execute the code only if both value are true. Which comparison operator should you use?

60. Which is the most secure way to avoid storing a password in clear text in database?

61. What does this code output?echo 76 <=> '76 trombones';

62. The ____ function writes a text string and creates the file if it does not exist.

63. A web application starts when a client sends a/an ________________ to a server.

64. A _______ is a complete declarative sentence that summarizes your speech.

65. A(n) ____ operator is used in php to perform mathematical calculations.

66. To sort an associative array by key, use the ____ function.

67. The ____ function is used to create a constant.

68. The ____ function converts all of the letters in a string to capital letters.

69. The class ________ starts with the word class followed by the name of the class.

70. You use the ____ function to find the total number of elements in an array.

71. You can create ____ that consist of multiple indexes or keys.

72. Instead of reading a large text file into php, you can use the ____ to iterate through a text file.

73. In php, the escape character is the ____.

74. In php, a(n) e-mail message is sent using the ____ function.

75. By default, the properties of a php class are ____________.

76. A form that contains the values that a user previously entered in the form is called a ____ form.

77. Which is correct about NULL?

78. .... is a way to store information (in variables ) to be used across multiple pages.

79. You can extend the exception class, but you cannot override any of the preceding methods because they are declared as

80. How would you create enums in PHP?

81. If you are given two dates in this form   ??: Start Date: 2007-03-24 End Date: 2009-06-26 Which code snippet finds the difference between these two in the following form: 2 years, 3 months and 2 days PHP 5.3

82. What is $_REQUEST?

83. How can short tags be enabled in PHP?

84. By which delimiters are PHP scripts enclosed?

85. .... function delays execution of the current script for a specified number of seconds.

86. Which loop does not exist in PHP?

87. ___ will display everything about the PHP installation, including the modules, version, variables, etc.

88. Pick the correct PHP function to rewind the internal array pointer.

89. Output of this code? php $x = 1; while ($x <= 3){ echo X}

90. Which is used to print today's date in PHP?

91. PHP ... are used to validate and sanitize external input.

92. Which will return the client's IP address in PHP?

93. In which order are methods called in the below PHP code? $object->method1()->method2()->method3()

94. What does '===' operator do in PHP?

95. Operator to access static properties or methods of a class?

96. Several predefined variables in PHP are _____.

97. Which PHP sort method sorts by value?

98. Time interval in the given dateInterval object specification: new DateInterval('P0000-10-00T00:01:01');

99. Which is not a valid directive for declare construct?

100. Which will produce a value of '83' as its output??