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Certified PHP Developer Practice Exam
- What does PHP stand for? A) Personal Home Page B) Hypertext Preprocessor C) Preprocessed Hypertext D) Hypertext Processor Correct Answer: B) Hypertext Preprocessor Explanation: PHP originally stood for "Personal Home Page," but it now stands for "Hypertext Preprocessor," which is a recursive acronym.
- Which of the following is NOT a PHP development environment? A) XAMPP B) MAMP C) WAMP D) LAMP Correct Answer: D) LAMP
Explanation: LAMP is a solution stack that includes Linux, Apache, MySQL, and PHP/Perl/Python. It is not a specific development environment like XAMPP, MAMP, or WAMP.
- What is the correct way to declare a variable in PHP? A) $variable = 10; B) variable = 10; C) var variable = 10; D) set variable = 10; Correct Answer: A) $variable = 10; Explanation: In PHP, variables are declared with a dollar sign ($) followed by the variable name.
- Which of the following is a correct way to output text in PHP? A) echo "Hello, World!"; B) print "Hello, World!"; C) display "Hello, World!"; D) Both A and B Correct Answer: D) Both A and B
- Which PHP tag is used to embed PHP code within HTML? A) B) <% ... %> C) D) Correct Answer: A) Explanation: The tag is the standard way to embed PHP code within HTML.
- What is the output of the following PHP code? A) Hello, World! B) Hello,World! C) Hello, World! D) Hello,World Correct Answer: A) Hello, World! Explanation: The. operator is used to concatenate strings in PHP.
- Which of the following is NOT a valid PHP data type? A) Integer B) Float C) String D) Char Correct Answer: D) Char Explanation: PHP does not have a char data type. It uses string for character data.
- How can you define a constant in PHP? A) constant MY_CONSTANT = 10; B) define('MY_CONSTANT', 10); C) const MY_CONSTANT = 10; D) Both B and C Correct Answer: D) Both B and C Explanation: Constants can be defined using either the define() function or the const keyword.
- What is the purpose of the phpinfo() function?
A) include will generate a warning if the file is not found, while require will generate a fatal error. B) include is used for including PHP files, while require is used for including HTML files. C) include is faster than require. D) There is no difference between include and require. Correct Answer: A) include will generate a warning if the file is not found, while require will generate a fatal error. Explanation: The main difference is that require will produce a fatal error if the file is not found, while include will only produce a warning.
- Which function is used to check if a variable is set and not NULL? A) isset() B) is_set() C) empty() D) Both A and C Correct Answer: A) isset() Explanation: The isset() function checks if a variable is set and not NULL.
- What is the output of the following PHP code? A) 15 B) 510 C) 5 D) 10 Correct Answer: A) 15 Explanation: The + operator is used for addition in PHP.
- Which of the following is NOT a valid PHP variable name? A) $variable B) $_variable C) $variable D) $123variable Correct Answer: D) $123variable Explanation: PHP variable names must start with a letter or underscore, followed by any number of letters, numbers, or underscores.
A) Hello World! B) HelloWorld! C) Hello World D) HelloWorld Correct Answer: A) Hello World! Explanation: The variables $x and $y are interpolated within the double-quoted string.
- Which of the following is a correct way to declare a constant in PHP? A) const MY_CONSTANT = 10; B) define('MY_CONSTANT', 10); C) constant MY_CONSTANT = 10; D) Both A and B Correct Answer: D) Both A and B Explanation: Constants can be declared using either the const keyword or the define() function.
- What is the purpose of the php.ini file?
A) To configure PHP settings B) To store PHP scripts C) To log PHP errors D) To define PHP functions Correct Answer: A) To configure PHP settings Explanation: The php.ini file is used to configure PHP settings.
- Which of the following is NOT a valid PHP data type? A) Integer B) Float C) Boolean D) Char Correct Answer: D) Char Explanation: PHP does not have a char data type. It uses string for character data.
- What is the output of the following PHP code? A) true
B) 5
C) 10
D) 55
Correct Answer: A) 50 Explanation: The * operator is used for multiplication in PHP.
- Which of the following is a correct way to start a PHP session? A) session_start(); B) start_session(); C) init_session(); D) begin_session(); Correct Answer: A) session_start(); Explanation: The session_start() function is used to start a PHP session.
- What is the purpose of the header() function in PHP? A) To send a raw HTTP header B) To display the HTTP headers
C) To set the HTTP response code D) To get the HTTP headers Correct Answer: A) To send a raw HTTP header Explanation: The header() function is used to send a raw HTTP header.
- Which of the following is NOT a valid PHP superglobal? A) $_GET B) $_POST C) $_SESSION D) $_REQUEST Correct Answer: D) $_REQUEST Explanation: $_REQUEST is a valid PHP superglobal, but it is not recommended to use it due to security concerns.
- What is the output of the following PHP code? A) 0. B) 5
C) To exit the current loop D) To exit the current block Correct Answer: A) To terminate the script Explanation: The exit() function terminates the script.
- Which of the following is a correct way to include a file in PHP? A) include 'file.php'; B) require 'file.php'; C) import 'file.php'; D) Both A and B Correct Answer: D) Both A and B Explanation: Both include and require are used to include a file in PHP.
- What is the output of the following PHP code? A) true B) false C) 1
D) 0
Correct Answer: B) false Explanation: The === operator checks for equality without type juggling, so 5 is not equal to "5".
- Which function is used to get the type of a variable in PHP? A) gettype() B) typeof() C) type() D) var_type() Correct Answer: A) gettype() Explanation: The gettype() function returns the type of a variable.
- What is the output of the following PHP code? A) 5 B) 0 C) 1
Correct Answer: D) Both A and C Explanation: The unset() function is used to destroy a variable or remove an element from an array.
- Which of the following is NOT a valid PHP comparison operator? A) == B) === C) != D) <> Correct Answer: D) <> Explanation: <> is not a valid PHP comparison operator. The correct operator for not equal is !=.
- What is the output of the following PHP code? $y; ?> A) - 1 B) 0 C) 1 D) 2
Correct Answer: A) - 1 Explanation: The <=> operator is the spaceship operator, which returns - 1 if the left side is less than the right side.
- Which function is used to check if a variable is empty in PHP? A) is_empty() B) empty() C) check_empty() D) var_empty() Correct Answer: B) empty() Explanation: The empty() function checks if a variable is empty.
- What is the purpose of the die() function in PHP? A) To terminate the script B) To exit the current function C) To exit the current loop D) To exit the current block
