This comprehensive collection of PHP MCQs is specifically crafted to enhance understanding of the fundamental concepts and practices that underpin server-side scripting and web development. Covering key topics such as PHP syntax, data types, functions, object-oriented programming, and database interactions, these questions aim to reinforce both theoretical knowledge and practical application. Ideal for students studying computer science, web development, or information technology, as well as professionals looking to refresh their PHP skills or prepare for certification exams, this set focuses on the essential elements that contribute to creating dynamic and interactive web applications.
Who should practice PHP MCQs?
- Students preparing for exams in web development, computer science, or related fields with a focus on server-side programming.
- Professionals seeking to deepen their understanding of PHP for career advancement in web development or software engineering.
- Candidates preparing for certification exams in web technologies or PHP development.
- Individuals looking to refresh their knowledge of PHP and its applications in web development.
- Anyone interested in building a strong foundation in PHP to pursue further studies or a career in web application development, e-commerce, or content management systems
1. What does PHP stand for?
A) Personal Hypertext Processor
B) Preprocessor Hypertext PHP
C) Personal Home Page
D) Preprocessed Hypertext Page
View AnswerA
2. Which of the following is a valid PHP variable name?
A) $1var
B) $_var
C) $var-name
D) var
View AnswerB
3. How do you create a comment in PHP?
A) <!-- This is a comment -->
B) // This is a comment
C) # This is a comment
D) Both B and C
View AnswerD
4. Which function is used to include the content of one PHP file into another?
A) include()
B) require()
C) import()
D) Both A and B
View AnswerD
5. What is the correct way to declare a PHP array?
A) $array = array(1, 2, 3);
B) $array = [1, 2, 3];
C) Both A and B
D) $array = {1, 2, 3};
View AnswerC
6. Which of the following functions can be used to start a session in PHP?
A) session_start()
B) start_session()
C) begin_session()
D) init_session()
View AnswerA
7. How can you get the current date in PHP?
A) date("Y-m-d");
B) current_date();
C) getdate();
D) today();
View AnswerA
8. What will be the output of the following PHP code? echo 5 + "10 cats";
A) 15
B) 510
C) 5
D) 10
View AnswerA
9. Which of the following is a PHP superglobal variable?
A) $GLOBALS
B) $SESSION
C) $SERVER
D) All of the above
View AnswerD
10. What will the following code output? echo (true + false);
A) 0
B) 1
C) 2
D) true
View AnswerB
11. Which function is used to connect to a MySQL database in PHP?
A) mysql_connect()
B) mysqli_connect()
C) connect_mysql()
D) Both A and B
View AnswerD
12. How do you declare a constant in PHP?
A) const NAME = "value";
B) define("NAME", "value");
C) constant("NAME", "value");
D) Both A and B
View AnswerD
13. Which of the following is the correct way to create a function in PHP?
A) function myFunction() {}
B) create function myFunction() {}
C) function: myFunction() {}
D) myFunction() {}
View AnswerA
14. How do you access the value of a form element in PHP?
A) $_POST['element_name']
B) $_GET['element_name']
C) $_REQUEST['element_name']
D) All of the above
View AnswerD
15. Which PHP function is used to send a raw HTTP header?
A) header()
B) http_header()
C) send_header()
D) raw_header()
View AnswerA
16. What is the output of echo isset($var); if $var is not defined?
A) 1
B) 0
C) null
D) undefined
View AnswerB
17. Which operator is used for string concatenation in PHP?
A) +
B) .
C) &
D) ,
View AnswerB
18. What will the following code output? echo 10 % 3;
A) 3
B) 1
C) 10
D) 0
View AnswerB
19. How do you create a session variable in PHP?
A) $_SESSION['var'] = "value";
B) session['var'] = "value";
C) session_start('var', "value");
D) set_session('var', "value");
View AnswerA
20. Which function is used to convert a string to lowercase in PHP?
A) lowercase()
B) strtolower()
C) convert_lower()
D) string_lowercase()
View AnswerB
21. How do you prevent SQL injection in PHP?
A) Use mysqli_real_escape_string()
B) Use prepared statements
C) Both A and B
D) Use htmlspecialchars()
View AnswerC
22. What does the break statement do in PHP?
A) Exits the current script
B) Breaks out of a loop or switch statement
C) Ends a function
D) None of the above
View AnswerB
23. Which PHP function is used to find the length of a string?
A) strlen()
B) str_length()
C) length()
D) string_length()
View AnswerA
24. How do you access an object’s property in PHP?
A) object->property
B) object.property
C) object::property
D) object#property
View AnswerA
25. Which PHP function can be used to sort an array in ascending order?
A) sort()
B) asort()
C) ksort()
D) All of the above
View AnswerD
26. How do you declare an array in PHP?
A) $array = []
B) $array = array()
C) Both A and B
D) $array = {}
View AnswerC
27. What is the output of echo 3 == "3"; in PHP?
A) true
B) false
C) 1
D) 0
View AnswerC
28. What is the purpose of the require_once() function?
A) To include a file only once
B) To include a file multiple times
C) To create a new file
D) To check if a file exists
View AnswerA
29. How can you retrieve data sent via a POST request in PHP?
A) Using $_POST[]
B) Using $_GET[]
C) Using $_REQUEST[]
D) Both A and C
View AnswerD
30. What will the following code output? echo (5 == "5") ? "Equal" : "Not Equal";
A) Equal
B) Not Equal
C) 1
D) 0
View AnswerA
31. Which function can be used to get the IP address of the user in PHP?
A) $_SERVER['REMOTE_ADDR']
B) get_ip_address()
C) $_REQUEST['IP']
D) $_GET['ip']
View AnswerA
32. How do you declare a multi-dimensional array in PHP?
A) $array = array(array());
B) $array = [ [ ] ];
C) Both A and B
D) $array = {{} };
View AnswerC
33. What does the explode() function do in PHP?
A) Joins an array into a string
B) Splits a string into an array
C) Reverses a string
D) None of the above
View AnswerB
34. How do you define a class in PHP?
A) class MyClass {}
B) define class MyClass {}
C) create class MyClass {}
D) MyClass class {}
View AnswerA
35. What is the output of echo 10 == "10.0";?
A) true
B) false
C) 1
D) 0
View AnswerA
36. Which function is used to delete a file in PHP?
A) unlink()
B) remove_file()
C) delete()
D) file_delete()
View AnswerA
37. How do you start a PHP session?
A) session_init();
B) session_start();
C) begin_session();
D) start_session();
View AnswerB
38. Which method is not a valid HTTP method?
A) GET
B) POST
C) DELETE
D) SAVE
View AnswerD
39. What will the following code output? echo (5 == 5) && (5 == 6);
A) true
B) false
C) 1
D) 0
View AnswerB
40. Which of the following can be used to include files in PHP?
A) include()
B) require()
C) require_once()
D) All of the above
View AnswerD
41. Which function can be used to find the position of the first occurrence of a substring in a string?
A) strpos()
B) indexOf()
C) search()
D) find()
View AnswerA
42. How can you create a constant in PHP?
A) define("CONSTANT_NAME", "value");
B) const CONSTANT_NAME = "value";
C) Both A and B
D) create_constant("CONSTANT_NAME", "value");
View AnswerC
43. Which of the following will show all errors in PHP?
A) error_reporting(0);
B) error_reporting(E_ALL);
C) display_errors(1);
D) show_errors(1);
View AnswerB
44. What is the output of echo (false || true);?
A) true
B) false
C) 1
D) 0
View AnswerC
45. Which of the following is not a valid way to connect to a MySQL database using PDO?
A) new PDO("mysql:host=localhost;dbname=test", $user, $pass);
B) new PDO("mysql:host=localhost;dbname=test", "username", "password");
C) new PDO("pgsql:host=localhost;dbname=test", $user, $pass);
D) new PDO("mysql:host=localhost;dbname=test", "", "");
View AnswerC
46. How can you retrieve the last inserted ID in PHP after an INSERT operation?
A) mysqli_insert_id($connection)
B) last_insert_id()
C) insert_id()
D) get_last_id()
View AnswerA
47. What is the correct way to check if a variable is an array in PHP?
A) is_array($var)
B) array_check($var)
C) check_array($var)
D) var_is_array($var)
View AnswerA
48. What will the following code output? echo 5 != 5;
A) true
B) false
C) 1
D) 0
View AnswerB
49. Which of the following functions can be used to trim whitespace from the beginning and end of a string?
A) trim()
B) str_trim()
C) strip()
D) clean()
View AnswerA
50. Which of the following statements is true about PHP sessions?
A) Sessions store data on the server
B) Sessions store data on the client
C) Sessions are deleted when the browser is closed
D) Both A and C
View AnswerD
51. Which of the following is a valid way to handle exceptions in PHP?
A) try { } catch { }
B) try { } catch(Exception $e) { }
C) catch { }
D) handle_exception { }
View AnswerB
52. How do you declare a PHP class?
A) class ClassName {}
B) declare class ClassName {}
C) create class ClassName {}
D) function ClassName {}
View AnswerA
53. What is the purpose of the final keyword in PHP?
A) To define a constant
B) To prevent method overriding
C) To end a script
D) To define a final class
View AnswerB
54. Which function can be used to convert an object to an array in PHP?
A) array()
B) object_to_array()
C) json_decode()
D) get_object_vars()
View AnswerC
55. How can you prevent file upload vulnerabilities in PHP?
A) Check file extensions
B) Use is_uploaded_file()
C) Validate file types
D) All of the above
View AnswerD
56. Which PHP function is used to retrieve all the keys of an array?
A) array_keys()
B) get_keys()
C) keys()
D) list_keys()
View AnswerA
57. How do you check if a variable is empty in PHP?
A) is_empty($var)
B) empty($var)
C) check_empty($var)
D) var_empty($var)
View AnswerB
58. Which function is used to format a number in PHP?
A) number_format()
B) format_number()
C) num_format()
D) format()
View AnswerA
59. What will be the output of the following code? echo (10 === "10");
A) true
B) false
C) 1
D) 0
View AnswerB
60. Which of the following is not a PHP magic constant?
A) __LINE__
B) __FILE__
C) __METHOD__
D) __CONSTRUCTOR__
View AnswerD
61. What is the purpose of the array_map() function in PHP?
A) To filter elements of an array
B) To apply a callback to the elements of an array
C) To merge two arrays
D) To slice an array
View AnswerB
62. Which of the following is the correct way to redirect to another page in PHP?
A) header("Location: page.php");
B) redirect("page.php");
C) location("page.php");
D) go_to("page.php");
View AnswerA
63. What will be the output of echo 5 + "10.5";?
A) 15.5
B) 510.5
C) 10.5
D) 5
View AnswerA
64. Which function is used to retrieve a substring from a string in PHP?
A) substr()
B) substring()
C) str_sub()
D) cut_string()
View AnswerA
65. What does the empty() function return if the variable is set but contains an empty string?
A) true
B) false
C) null
D) 0
View AnswerA
66. How do you convert a string to an integer in PHP?
A) (int)$string
B) intval($string)
C) Both A and B
D) convert($string)
View AnswerC
67. Which operator is used for error control in PHP?
A) @
B) &
C) !
D) $
View AnswerA
68. How can you send an email using PHP?
A) mail("to@example.com", "Subject", "Message");
B) send_email("to@example.com", "Subject", "Message");
C) email("to@example.com", "Subject", "Message");
D) post_email("to@example.com", "Subject", "Message");
View AnswerA
69. What is the output of echo 5 <=> 10;?
A) -1
B) 0
C) 1
D) true
View AnswerA
70. Which PHP function can be used to get the current script’s filename?
A) get_filename()
B) current_file()
C) __FILE__
D) script_name()
View AnswerC
71. How do you handle errors in PHP using the error handling functions?
A) Using try and catch
B) Using error_reporting()
C) Using set_error_handler()
D) All of the above
View AnswerD
72. Which method is used to retrieve data from a MySQL database using PDO?
A) execute()
B) fetch()
C) query()
D) All of the above
View AnswerD
73. What will the following code output? echo (5 != "5");?
A) true
B) false
C) 1
D) 0
View AnswerB
74. What will be the output of echo isset($undefined_var);?
A) true
B) false
C) 1
D) 0
View AnswerB
75. Which of the following statements is used to end a loop in PHP?
A) exit;
B) break;
C) stop;
D) end;
View AnswerB
76. Which function is used to get the type of a variable in PHP?
A) gettype()
B) type_of()
C) var_type()
D) typeof()
View AnswerA
77. Which of the following will not create an array in PHP?
A) array(1, 2, 3)
B) [1, 2, 3]
C) array{1, 2, 3}
D) []
View AnswerC
78. What is the correct way to use the foreach loop in PHP?
A) foreach($array as $value) {}
B) for each($array as $value) {}
C) foreach($array in $value) {}
D) for($value in $array) {}
View AnswerA
79. How can you include a PHP file without throwing an error if the file does not exist?
A) include()
B) require()
C) include_once()
D) @include()
View AnswerD
80. Which function is used to escape special characters in a string for use in an SQL statement?
A) mysql_escape_string()
B) mysqli_real_escape_string()
C) sql_escape()
D) escape_string()
View AnswerB
81. What does the isset() function do in PHP?
A) Checks if a variable is declared and is not null
B) Checks if a variable is empty
C) Checks if a variable exists
D) Both A and C
View AnswerD
82. What will be the output of echo (1 == "1.0");?
A) true
B) false
C) 1
D) 0
View AnswerA
83. How do you set the maximum upload file size in PHP?
A) php.ini configuration
B) set_upload_size() function
C) max_upload_size() function
D) None of the above
View AnswerA
84. Which of the following is the correct syntax to define a method in a class?
A) function myMethod() {}
B) method myMethod() {}
C) def myMethod() {}
D) create myMethod() {}
View AnswerA
85. How can you count the number of elements in an array in PHP?
A) count($array)
B) length($array)
C) size($array)
D) num_elements($array)
View AnswerA
86. What will be the output of echo 0 == "0.0";?
A) true
B) false
C) 1
D) 0
View AnswerA
87. How do you create a cookie in PHP?
A) set_cookie("name", "value", time() + 3600);
B) setcookie("name", "value", time() + 3600);
C) cookie("name", "value", time() + 3600);
D) create_cookie("name", "value", time() + 3600);
View AnswerB
88. Which PHP function is used to sort an array in reverse order?
A) sort_reverse()
B) rsort()
C) reverse_sort()
D) array_reverse()
View AnswerB
89. How do you connect to a MySQL database using MySQLi in PHP?
A) mysqli_connect("localhost", "username", "password", "database");
B) mysql_connect("localhost", "username", "password", "database");
C) connect("localhost", "username", "password", "database");
D) db_connect("localhost", "username", "password", "database");
View AnswerA
90. What is the output of echo (10 == "10.0");?
A) true
B) false
C) 1
D) 0
View AnswerA
91. How can you create a new PHP session?
A) session_create();
B) session_start();
C) start_session();
D) new_session();
View AnswerB
92. Which of the following can be used to escape HTML characters in PHP?
A) htmlspecialchars()
B) html_escape()
C) escape_html()
D) strip_tags()
View AnswerA
93. How do you get the HTTP request method in PHP?
A) $_SERVER['REQUEST_METHOD']
B) get_request_method()
C) $_GET['method']
D) method()
View AnswerA
94. What is the correct syntax to define a constructor in a PHP class?
A) function __construct() {}
B) constructor() {}
C) create __construct() {}
D) __construct() {}
View AnswerA
95. Which of the following will not stop the execution of a PHP script?
A) exit();
B) die();
C) return;
D) break;
View AnswerC
96. What will the following code output? echo (10 != "10");?
A) true
B) false
C) 1
D) 0
View AnswerB
97. Which function can be used to check if a variable is a number in PHP?
A) is_numeric()
B) is_number()
C) check_number()
D) num_check()
View AnswerA
98. What is the correct way to handle an exception in PHP?
A) try { } catch(Exception $e) { }
B) try { } handle(Exception $e) { }
C) catch(Exception $e) { }
D) try { } except { }
View AnswerA
99. Which of the following is the correct way to define an interface in PHP?
A) interface MyInterface {}
B) create interface MyInterface {}
C) define interface MyInterface {}
D) MyInterface interface {}
View AnswerA
100. How do you get the absolute path of a file in PHP?
A) realpath("filename")
B) get_absolute_path("filename")
C) absolute_path("filename")
D) path("filename")
View AnswerA