PHP is a server-side scripting programming language that is widely used as an open-source scripting language for web development. The code written in PHP is executed on the server side, and the result is sent to the web browser of the client.
It can easily run on Windows, Linux, MacOS, etc. Many questions asked during interview rounds are based on the PHP language. Here, in this article, we will learn about some of the top PHP interview questions.
TOP PHP Interview Questions For 2024
Let us now know some of the important Interview PHP questions.
Q1. Who is also known as the father of PHP?
Ans: Rasmus Lerdorf is known as the father of PHP. He created this language in 1994.
Q2. How do I install PHP on our system?
Ans. This is among the most fundamental PHP interview questions. You can easily download PHP on your Windows computer.
- Visit http://www.php.net/downloads.php to download the PHP Windows zip package.
- Extract the package into the directory (C:\PHP) where you wish to install PHP.
- You can use any command prompt to run PHP by adding the path to the PHP binaries to your PATH environment variable.
- Use a text editor to open the php.ini file and make any desired configuration changes (e.g., enable error reporting, and set your time zone).
- For your web server to load the updated PHP configuration, restart it.
Q3. How do I run a PHP script on a system?
Ans: Follow this step below to run PHP script on your system.
- First, we must have a web server which is configured to the PHP programming language.
- Now, create a.php file extension.
- Save this file, which can be accessed easily by visiting the specified URL of the file.
- If the code is written correctly, then you can see the output on the screen.
Q4. What are some applications of PHP Language?
Ans: There are many applications of PHP language. Check it out below.
- It can easily create, open, read, write, and close files on the system.
- You can easily collect, save, send, and return data using this language on the server side.
- The database can be modified using PHP, such as adding and deleting row elements in a relational database.
- PHP is used in web development for making interactive websites.
- Many popular platforms use PHP to manage and publish their content on the web.
- Social media platforms, E-commerce websites. Web applications are deployed using the PHP.
Q5. What is the latest version of PHP language in 2024?
Ans: The latest version of PHP is 8.2.0, released on December 8, 2022.
Q6. Which programming language does PHP resemble the most?
Ans: PHP language is more similar to C and Perl language.
Q7. What are some popular frameworks in PHP?
Ans: Some popular frameworks of PHP are given here.
- Symfony
- CakePHP
- Codelgniter
- Zend Framework
- Laravel
- Phalcon
- Slim
Q8. Is PHP Language case-sensitive?
Ans: Yes, PHP language is case sensitive. However, the function names are not completely case-sensitive. For example, the user-defined functions can be defined in any case and are not case sensitive in PHP.
Q9. How is the PHP script executed using the CLI interface?
Ans: The PHP is executed in the Command line interface using the .php extension and the fileName.
| Php filename.php |
Q10. What are the different types of variables present in PHP?
Ans: PHP contains almost all the major data types. However, the major eight data variables are given below.
- Array
- Double
- Boolean
- Integer
- Object
- NULL
- String
- Resource
Q11. What is NULL in PHP?
Ans: NULL is a particular type of data in PHP, representing that the data contains only NULL values. It is not case-sensitive and can be declared using lowercase or uppercase.
Q12. What are various predefined constants used in PHP?
Ans: Some predefined methods in PHP are _METHOD_, _CLASS_, _FUNCTION_, _LINE_, _FILE_.
Q13. What is the difference between PHP4 and PHP5?
Ans: The difference between PHP4 and PHP5 is given in the table.
| Top PHP Interview Questions | |
| PHP4 | PHP5 |
| No support for static methods | Allows static methods to be used. |
| It is not possible to declare abstract classes. | It is possible to declare abstract classes. |
| The call-by-value technique is applied. | The call-by-reference technique is applied. |
| Class names can be used for constructors. | Constructors have separate names |
Q14. Name some of the popular content management systems (CMS) in PHP.
Ans: Some popular CMS platforms which support PHP are given below.
- WordPress
- Magento
- Drupal
- Joomla
Q15. What is the difference between PHP Constants and variables?
Ans: Some of the major differences between PHP constants and variables are given here.
- Constants in PHP are global, which means we can access it from anywhere.
- Variables are accessible only in the block where they are declared.
- Constants need to be explicitly defined, while variables can work without intializing.
Q16. . What is the difference between constructors and destructors in PHP?
Ans: In the PHP language, constructors and destructors are two fundamental ideas. A specific method that is invoked automatically upon object creation is known as a constructor. This procedure enables the device to initialize any required data and carry out any setup needed prior to usage.
Q17. Can PHP interact with HTML?
Ans: Yes, PHP can be used with HTML in web development to create scripts which can easily be converted to PHP.
Q18. How many scopes are available in the PHP?
Ans: There are generally three PHP scope variables.
- Private: It can be detected only inside the same block.
- Public: It can be accessed from outside the block. No security parameters are ensured in this scope.
- Protected: In this scope, the parent class can access the current class by extending the class.
Q19. How can we display text using the PHP scripts?
Ans: We can display text using the PHP scripts using two methods.
|
Q20. What is a parse error in PHP- unexpected T_variable at line x.
Ans: This error is a syntax error caused in PHP, which tells us that there is a mistake at line x.
Top PHP Interview Questions FAQs
What is overloading and overriding in PHP?
Web applications and websites can be made with PHP. Overloading and overriding are some of its many features. The ability to define multiple methods with the same name but different parameters is called overloading. The power to redefine an inherited method is known as overriding.
What is the difference between the GET and POST method in PHP?
When communicating online between a server and a client, two of the most fundamental techniques are GET and POST. POST requests send data to a server, whereas GET requests ask a server to return a resource.
What is the lambda function in PHP?
The lambda function in PHP is used to perform specific tasks which are declared without a name.
