PHP Fresher Interview Questions (With Sample Answers)

By Indeed Editorial Team

Published 12 April 2022

The Indeed Editorial Team comprises a diverse and talented team of writers, researchers and subject matter experts equipped with Indeed's data and insights to deliver useful tips to help guide your career journey.

PHP is a server-side scripting language for the web which can help create web pages and applications. PHP-based web pages are dynamic and with the increase in web-based technologies, it has become an important skill in many web-development related roles. If you are a fresher and participating in a PHP interview, knowing answers to some common PHP interview questions can be helpful. In this article, we discuss some common PHP interview questions for freshers with example answers that can help you prepare for your interview.

Common PHP fresher interview questions

The general use of PHP fresher interview questions may be to test their proficiency in developing PHP based web applications. Because developers may require demonstrating creativity, critical thinking and problem-solving abilities, interviewers may prioritise responses that indicate technical and soft skills. The interviewer might ask basic questions at the start and may further increase the difficulty level of questions. Here are some common PHP interview questions for freshers you can expect in a web developer interview:

  • Explain the difference between variables and constants in PHP.

  • Is PHP a case-sensitive language?

  • Explain the types of loops available in PHP.

  • Why is the purpose of 'ksort' in PHP?

  • What is PEAR in PHP?

  • Explain the use of @ symbol in PHP.

  • What was the old name of PHP?

  • Describe some of the basic features of PHP7.

  • What is the correct way to open and close a PHP block of code?

  • Explain the use of the 'constant' function.

  • Why is it important to use cookies?

  • List the types of Array in PHP.

  • How can you export data into a spreadsheet file?

  • How can you initiate a session in PHP?

Related: 23 Interview Tips: How To Get The Job

PHP interview questions with sample answers

Here are some common PHP fresher interview questions along with their sample answers:

What is PHP?

It is a common approach to begin a series of PHP interview questions in terms of introduction questions. Try to provide a brief and relevant answer to this question. To address the entire subject, describe PHP and outline its uses.

Example: "A hypertext preprocessor, also known as a PHP, is a server-side open-source scripting language primarily used to develop dynamic and interactive websites and applications."

Related: What Is C Programming Language? Benefits And Career Advice

What is your experience with PHP?

When replying to this question, use this opportunity to broaden your description of PHP further by describing a time when you applied PHP to solve an issue and received your desired result. To accomplish this, it may be necessary to know some advantages of PHP over other programming languages.

Example: "When I developed websites for a web design company during my internship, they assigned me the task of creating an online ordering system. I used PHP scripting language to produce dynamic HTML and JavaScript. I wrote the PHP scripts to generate JavaScript after running on the server-side, as JavaScript can easily run in a client browser. It was an excellent choice for developing front-end functionality that enabled end users to buy products. Resulting from that, the company had a robust, self-hosted customer portal that supported in sales growth."

Related: 15 Software Developer Skills And How To Develop Them

What is a session in PHP?

This is a question that checks your basic knowledge of PHP. You can answer this question by defining the session in PHP and how it works.

Example: “A session in PHP is a way to store information on a server rather than the computer of the user to get used across multiple pages of an entire website. In a temporary directory, the session creates a file to store the registered session variables and their values. This information is available to all pages on the site during that visit.”

Explain the execution of PHP.

The purpose of asking such a question might be to test the depth of your understanding of PHP. Focus on answering the question by explaining the execution process.

Example: "PHP is a programming language that you can also use in the command-line interface. It is, rather, a collection of scripts to create code that you can run in various ways. You can execute PHP when the script's exact filename is specified in the command-line interface. You may also use PHP to build additional programming languages such as JavaScript. In the case of JavaScript, PHP generates the code, which is executed after the browser accesses it."

How can you differentiate between echo and print in PHP?

Interviewers commonly ask this question during PHP interviews to determine your familiarity with fundamental concepts and your ability to answer this question properly. You can briefly describe these two functions and highlight the application-specific differences between them to answer this question.

Example: "In PHP, the Echo and Print functions are similar as they both output data to the screen. Echo is slightly faster and has the capability to take multiple parameters, though this is very rare. Echo does not have a return value. Print, on either side, returns a single value. That means it can be used in expressions. Print supports one argument only."

Related: 100 Java Interview Questions For Freshers With Example Answers

What is the required operation to pass information from a URL?

This question generally seeks a practical response on how to ensure that the information passed from site to site is correct. Answering this question can show your technical knowledge of PHP and its important features.

Example: “The operations required to pass information via the URL are htmlspecialchars() and urlencode(). Uses of these are to encode and decode the information that can pass via URL or form."

How can PHP pass information from one site to another and why it is important?

The interviewer asks such a question to evaluate your depth of knowledge about PHP, frame your answer in an easy-to-understand response. You can explain complex ideas in simple language using examples. This also allows the interviewer to test your communication and interpersonal skills in action.

Example: “PHP can pass information from one site to the next through the URL. This is convenient for most users. For example, suppose I integrate a social media account with a news website to comment on my social media profile. With PHP, my recognised user info can pass from page to page via the URL. It also allows marketers to pass tracking data from site to site.”

Tell me the difference between 'for' and 'foreach'.

Through this question, the interviewer may test your knowledge of these loops and how they vary in their application. 'for' and 'foreach' are the two types of loops in PHP and has specific applications. To respond to this question, you can briefly describe the difference between the two loops and mention their use in a PHP programme.

Example: "In PHP, the 'foreach' loop is used to implement associative arrays. The 'for' loop, on the contrary, works with variables. If I consider how both the loops function, the 'for' loop ends when the loop condition meets, whereas the 'for each' loop continues till the array count ends."

What are the advantages of using PHP?

The interviewers may ask this question to check your practical knowledge of PHP. The interviewers know that this understanding can develop from working in a practical setting. Therefore, ensure that you answer with more than just the basic definition of the language. You can state the practical advantages of using PHP.

Example: "PHP is a scripting language, which implies that it includes a series of scripts that can be programmed to perform various tasks upon execution, such as coding in other more user-friendly languages. Typically, PHP scripts are used to build the functionalities of a website or web application. PHP is an open-source programming language. This means that it is not subject to developer upgrades or proprietary restrictions.

Moreover, PHP is platform-independent as it can run on a wide number of platforms and is not dependent on any proprietary platform. Numerous databases can integrate with PHP. It is also compatible with the majority of popular web servers. It is also very cost-effective and affordable to build and maintain."

Related: What Does A PHP Developer Do? (Responsibilities And Salary)

What is the difference between PHP 5 and PHP 7?

This question helps an interviewer evaluate if you keep up-to-date knowledge of PHP. PHP 5 and PHP 7 are the version update of PHP. You can briefly describe the difference, demonstrating the new feature or improvement in the latest version.

Example: "PHP 7 is an improved version of PHP 5 that provides faster performance while using less memory. The major difference is PHP 5 uses Zend II, but PHP 7 uses a new model of engine called PHPNG or Next Generation."

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