20+ Junior PHP Developer Interview Questions and Answers

PEAR is a framework and distribution system for reusable PHP components.

• PEAR stands for PHP Extension and Application Repository.

• It provides a structured library of code for PHP developers.

• PEAR packages can be easily installed and managed using the PEAR command-line tool.

• Some popular PEAR packages include PHPUnit, HTML_QuickForm, and Mail.

• Dynamic websites generate content on the fly, while static websites display the same content to all users.

• PHP scripts can be executed in th...read more

array_merge merges two or more arrays into one, while array_combine creates an array by using one array for keys and another for its values.

• array_merge combines the values of two or more arrays into a single array

• array_combine creates an array using one array for keys and another for its values

• array_merge preserves numeric keys, while array_combine uses the first array as keys and the second as values

• array_merge can merge any number of arrays, while array_combine requires two...read more

CRUD operations in Codeigniter, Core PHP, and Laravel

• Codeigniter: Use the built-in functions like insert(), get(), update(), and delete() to perform CRUD operations.

• Core PHP: Write custom functions to handle database operations using SQL queries.

• Laravel: Utilize the Eloquent ORM to easily perform CRUD operations using models and database migrations.

Common security risks in PHP applications include SQL injection, cross-site scripting (XSS), and insecure file uploads.

• SQL injection: Attackers can manipulate SQL queries to access or modify database data. Example: Using user input directly in SQL queries without proper sanitization.

• Cross-site scripting (XSS): Attackers can inject malicious scripts into web pages viewed by other users. Example: Allowing users to input HTML or JavaScript without proper validation.

• Insecure file...read more

Use PHP filters to validate form data and store in database.

• Use filter_input() function to validate input data.

• Sanitize data using filter_var() function.

• Connect to database and insert data using prepared statements.

• Handle errors and exceptions appropriately.

let, const and var are used to declare variables in JavaScript with different scoping rules.

• var has function scope and can be redeclared and reassigned

• let and const have block scope and cannot be redeclared

• const cannot be reassigned after declaration

• let can be reassigned after declaration

• Use const for values that won't change, let for values that will change

• Example: var x = 10; let y = 20; const z = 30;

• Example: function example() { var x = 10; let y = 20; const z = 30; }

• Examp...read more

I have 2 years of experience in web development.

• I have worked on various projects using PHP, HTML, CSS, and JavaScript.

• I have experience in developing responsive websites and web applications.

• I have worked with popular CMS platforms like WordPress and Drupal.

• I have knowledge of database management using MySQL and SQL Server.

• I have experience in version control using Git.

• I have worked in a team environment and have good communication skills.

A CDN is a network of servers that deliver web content to users based on their geographic location.

• Improves website loading speed by caching content closer to users.

• Reduces latency and bandwidth usage, enhancing user experience.

• Examples include Cloudflare, Amazon CloudFront, and Akamai.

• Provides redundancy and reliability, minimizing downtime.

• Can help with DDoS protection and security features.

OOPs concepts in PHP include inheritance, encapsulation, polymorphism, and abstraction.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Encapsulation is the practice of keeping properties and methods private to a class.

• Polymorphism allows objects of different classes to be treated as if they are of the same class.

• Abstraction is the process of hiding implementation details while showing only the necessary information.

• Examples of OOPs concepts in...read more

The latest version of Laravel is 8.0.

• Laravel 8.0 was released on September 8, 2020.

• It includes new features like Laravel Jetstream, model factory classes, and dynamic blade components.

• It requires PHP 7.3+ and has support for PHP 8.0.

• Laravel follows semantic versioning, so major releases may include breaking changes.

Errors in PHP can be handled using try-catch blocks, error reporting functions, and custom error handling functions.

• Use try-catch blocks to catch exceptions and handle errors gracefully

• Set error reporting level using error_reporting() function to control which errors are displayed

• Create custom error handling functions using set_error_handler() to handle errors in a specific way

To create a simple form using CSS or Bootstrap, follow these pointers:

• Start with a basic HTML form structure

• Add CSS or Bootstrap classes to style the form elements

• Use form validation to ensure data is entered correctly

• Consider accessibility and usability when designing the form

Joins in SQL are used to combine data from two or more tables based on a related column.

• Joins are used to retrieve data from multiple tables in a single query

• There are different types of joins such as inner join, left join, right join, and full outer join

• Inner join returns only the matching rows from both tables

• Left join returns all the rows from the left table and matching rows from the right table

• Right join returns all the rows from the right table and matching rows from th...read more

Yes, I am okay with a 6 month verbal bond.

• I understand the importance of commitment and loyalty to the company.

• I am confident in my skills and ability to contribute to the company's success.

• I am willing to sign a written agreement if required.

• I expect fair treatment and opportunities for growth within the company.

Yes, I have worked on JavaScript.

• I have experience in using JavaScript for front-end development.

• I have worked with jQuery library for DOM manipulation and AJAX requests.

• I have also used JavaScript for form validation and creating interactive UI elements.

• I am familiar with ES6 features like arrow functions, template literals, and let/const declarations.

Common features of PHP include dynamic typing, easy integration with HTML, and extensive library support.

• Dynamic typing allows for flexibility in variable types

• Easy integration with HTML allows for server-side scripting

• Extensive library support allows for efficient development

• Other common features include object-oriented programming and database integration

PHP is a server-side scripting language used for web development.

• PHP stands for Hypertext Preprocessor.

• It is widely used for creating dynamic web pages and web applications.

• PHP code is embedded within HTML code.

• PHP can interact with databases like MySQL to create dynamic content.

• Popular content management systems like WordPress and Drupal are built using PHP.

PHP strings are sequences of characters used to store and manipulate text data in PHP programming.

• Strings can be defined using single quotes: $string = 'Hello, World!';

• Strings can also be defined using double quotes: $string = "Hello, World!";

• PHP supports various string operations like concatenation: $fullString = $string1 . $string2;

• You can access individual characters in a string: $char = $string[0]; // 'H'

• PHP has built-in functions for string manipulation, e.g., strlen($st...read more

JavaScript can be inserted in PHP using

Yes, I am okay with Shahibaug location.

• I am comfortable with the location.

• I have no issues with commuting to Shahibaug.

• I have worked in similar locations before.

PHP Object Oriented Programming (OOP) allows developers to create reusable code through classes and objects.

• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: class User { private $name; }

• Inheritance: Creating new classes based on existing ones, allowing for code reuse. Example: class Admin extends User {}

• Polymorphism: Methods can be redefined in derived classes. Example: function display() in User can be overridden in Admin.

• Ab...read more

I am a passionate Junior PHP Developer with a strong foundation in web development and a keen interest in learning new technologies.

• Educational Background: I hold a degree in Computer Science, where I learned the fundamentals of programming and web development.

• Hands-On Experience: I have completed several projects using PHP, such as a personal blog and a small e-commerce site, which helped me apply my skills.

• Familiarity with Frameworks: I have experience with Laravel, which I...read more

PHP arrays are versatile data structures that store multiple values in a single variable, allowing for efficient data management.

• Arrays can hold different data types: $arr = array(1, 'two', 3.0);

• Associative arrays use named keys: $assoc = array('name' => 'John', 'age' => 30);

• Arrays can be multidimensional: $multi = array(array(1, 2), array(3, 4));

• Accessing elements: echo $arr[0]; // Outputs: 1

• Count elements: echo count($arr); // Outputs: 3

PHP is a server-side scripting language primarily used for web development, enabling dynamic content generation and database interaction.

• Server-side scripting: PHP runs on the server, generating HTML content before it's sent to the client.

• Database interaction: PHP can connect to databases like MySQL, allowing for data storage and retrieval. Example: Using PDO for secure database access.

• Form handling: PHP processes form data submitted by users, enabling functionalities like us...read more