Question 1

What is the main difference between a variable and a constant in PHP?

Accepted Answer

A constant is defined once and its value cannot be modified afterwards, unlike a variable whose value can change at any time during script execution. Constants are declared with define() or const and do not require the $ symbol before their name. They are particularly useful for storing configuration values that should never change, such as file paths, base URLs, or API keys.

Question 2

What is a class in PHP?

Accepted Answer

A class is a blueprint that defines the properties and methods of an object. It encapsulates data (properties) and behaviors (methods) in a reusable structure. Classes allow creating multiple instances (objects) with the same structure but different values.

Question 3

What is Composer in the PHP ecosystem?

Accepted Answer

Composer is the standard dependency manager for PHP, allowing developers to declare and install libraries that a project depends on. It automatically manages compatible versions and downloads packages from Packagist. Unlike PEAR (legacy manager), Composer installs dependencies per project rather than globally.

Question 4

What is Artisan in Laravel?

Accepted Answer

Artisan is Laravel's built-in command-line interface. It automates many repetitive tasks such as creating controllers, models, migrations, and other components. This interface streamlines development by providing ready-to-use commands and the ability to create custom commands.

Question 5

Which artisan command allows creating a new migration?

Accepted Answer

The make:migration command generates a new migration file in the database/migrations folder with an automatic timestamp. This command accepts a descriptive migration name and can use --create or --table options to automatically generate base code. Using this command ensures standardized structure and consistent naming of migrations.

Question 6

Which method of a Form Request returns the validation rules?

Accepted Answer

The rules() method in a Form Request returns an associative array where each key is a field name and each value is a string or array of validation rules. This allows centralizing all validation logic outside the controller, making the code more testable and maintainable. Using Form Requests is considered a Laravel best practice for complex forms with multiple fields.

Question 7

What is a guard in Laravel?

Accepted Answer

A guard defines the authentication mechanism used to verify user identity. Laravel provides by default the 'web' guard for sessions and 'api' guard for tokens. Guards allow managing different authentication types simultaneously and configuring how users are authenticated in each request.

Question 8

What is a local scope in Eloquent?

Accepted Answer

Local scopes allow defining reusable query constraints in the model. They are declared with the scope prefix and called without it. This approach improves code readability and prevents duplication of filtering logic throughout the application.

Question 9

What is the Repository Pattern in Laravel?

Accepted Answer

The Repository Pattern is a design pattern that adds an abstraction layer between business logic and the data layer. It encapsulates data access logic in dedicated classes (repositories), allowing separation of concerns and making code more testable. Unlike using Eloquent directly in controllers, the repository centralizes complex queries and facilitates changing data sources without impacting the rest of the application.

Question 10

What is the main difference between the register() and boot() methods of a Service Provider?

Accepted Answer

The register() method is used to bind services to the IoC container without depending on other services, as they are not yet available. The boot() method is called after all providers have been registered, allowing access to all registered services and configuration of features that depend on them such as routes, views, or events.

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