PHP MCQs with Answers for Backend Developers

PHP, a server-side scripting language is known for its robust and dynamic capabilities. It opens doors to numerous opportunities in web development projects. Back-end developers need to stay updated with all the advancements happening in this programming language. One way to assess your knowledge is by going through PHP MCQs.

It is the quickest way to know how much you know in the scripting language. Engaging with PHP MCQs boosts a developer's ability to tackle real-world programming challenges efficiently.

MCQs are the easiest way to reinforce your knowledge of PHP syntax and best practices while promoting the application of PHP in various coding scenarios. Learning a programming language is just the beginning. Developers must continually gauge their skills against new standards and trends.

Self-assessment is the key to self-reflection in this highly competitive world. Practicing MCQs and interview questions keeps developers sharp and up-to-date, enhancing their ability to develop efficient, secure, and dynamic web applications.

PHP Interview Questions with Answers

Let us begin with your assessment through the following PHP MCQs. Note that these PHP MCQs mostly cover the basics of the PHP programming language. So, aspiring back-end developers can gauge their knowledge by going through the list of multiple-choice questions. 

These PHP MCQs cover a wide range of topics, from basic syntax and variable declaration to more complex concepts like string manipulation, control structures, and error handling. They test knowledge of output methods like echo and print, delve into PHP's history, and explore the variable scope, looping structures, and function definitions. 

Q1. Variable name in PHP starts with ______.

1. & (Ampersand)
2. $ (Dollar)
3. ! (Exclamation)
4. # (Hash)

Answer: $ (Dollar)

Q2. How to add a comment in PHP?

1. /*......*/
2. //……
3. &......&
4. Both a and b

Answer: d. Both a and b

Q3. Choose the correct use of the strlen() function in PHP.

1. The strlen() function returns the length of the string
2. The strlen() function gives the type of string
3. The strlen() function provides the value of the string
4. None of the above

Answer: a. The strlen() function returns the length of the string

Q4. _______ is the father of PHP.

1. Drek Kolkevi
2. William Makepiece
3. List Barely
4. Rasmus Lerdorf

Answer: d. Rasmus Lerdorf

Q5. Choose the correct default file extension used for PHP files.

1. .php
2. .ph
3. .html
4. .xml

Answer: a. .php

Q6. Which of the following is the correct output for the given PHP code:

1. Syntax error
2. No output
3. 1000 PHP MCQ
4. Welcome to Sanfoundry

Answer: c. 1000 PHP MCQ

Q7. ______ is used for concatenation PHP?

1. + (plus)
2. append()
3. * (Asterisk)
4. . (dot)

Answer: .(dot)

Q8. Which is faster: echo or print?

1. echo
2. print
3. Both have the same speed
4. Depends on the complexity of the program

Answer: a. echo

Q9. The correct output for the following PHP code is

1. Syntax error
2. NULL NULL
3. NULL null
4. NULL undefined 

Answer: b. NULL NULL

Q10. Choose the correct output for the following PHP program.

1. I Wonder
2. Which One
3. Is The
4. Correct Answer

Answer: b. Which One

Q11. PHP was developed in which of the following year?

1. 1994
2. 1995
3. 1996
4. 1999

Answer: a. 1994

Q12. Which of the following is not a valid variable scope for PHP?

1. static
2. local
3. global 
4. external 

Answer: d. external 

Q13. The loop used through a block of code for each element in an array is ____.

1. foreach
2. while
3. for
4. fun

Answer: a. foreach

Q14. Name the function in PHP that returns the time of sunrise of a particular day and location.

1. date-sunrise()
2. date_sunrise()
3. sunrise()
4. None of the above

Answer: b. date_sunrise()

Q15. The syntax to define a default argument value in PHP is

1. function function_name(type $argument_name=value) {/*function body*/}
2. function function_name(type $argument_name_value) {/*function body*/}
3. function function_name(type $argument_name:value) {/*function body*/}
4. function function_name(type $argument_name/value) {/*function body*/}

Answer: a. function function_name(type $argument_name=value) {/*function body*/}

Q16. Choose the right output for the following PHP code.

1. No output 
2. $GREETING
3. PHP is a scripting language
4. GREETING

Answer: a. No output

Q17. Which of the following terms is used for Objects?

1. instances
2. reference 
3. template
4. class 

Answer: a. instances 

Q18. PHP can be embedded in _______ type of documents.

1. HTML only
2. CSS only
3. HTM, CSS, and JavaScript
4. JavaScript only

Answer: a. HTML only

Q19. ______ PHP function is used to define a file’s last access time.

1. fileatime()
2. filetime()
3. filectime()
4. fiileltome()

Answer: a. fileatime()

Q20. Which of the following accepts any number of parameters?

1. get_argv()
2. func_get_args()
3. get_argc()
4. func_get_argv()

Answer: b. func_get_args()

Q21. What is the function used to move the pointer to the previous array position?

1. before()
2. previous()
3. Previous()
4. prev()

Answer: d. prev()

Q22. Total looping techniques supporting PHP are _____.

1. 4
2. 16
3. 22
4. 16

Answer: a. 4

Q23. Which scripting language is PHP an example of?

1. Server-side 
2. Client-side
3. Browser-side 
4. In-side 

Answer: a. Server-side 

Q24. The primary function of the foreach loop in PHP is

1. Iteration over keys and/or values of array
2. Iteration of string values
3. Iteration over a fixed number of times
4. Iteration only over numeric arrays

Answer: a. Iteration over keys and/or values of array

Q25. The correct output for the following PHP code is

1. 10
2. 5
3. 15
4. Syntax error

Answer: a. 10

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FAQs: PHP Fundamentals

What is the use of PHP frameworks?
It is a platform for building flexible, secure, high-performance PHP web applications and websites where it provides libraries for commonly used functions. 

Why use PHP for the backend?
PHP is widely used for the backend to increase user retention, loan pages instantly, and make products more intuitive to use. PHP is versatile, scalable, secure, and possesses integrated capabilities, making it a perfect choice for web development

Why do companies use frameworks?
Companies use frameworks as they offer an organized base that increases the speed of growth.

What is Ajax in PHP?
Ajax is an acronym for Asynchronous JavaScript, and XML is used in PHP to generate fast and dynamic web pages.

How to run a PHP file?
To run a PHP program, you have to open any web browser ans neter “localhost/demo.php” and click enter.

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