Impelsys Interview Questions, Process, and Tips for Experienced

There are three types of errors in PHP: syntax errors, runtime errors, and logical errors.

• Syntax errors occur when the code violates the rules of PHP syntax.

• Runtime errors occur during the execution of the script, such as division by zero or accessing undefined variables.

• Logical errors do not cause the script to terminate, but they produce incorrect results or unexpected behavior.

An autoloader is a function that automatically loads classes when they are needed in a PHP script.

• Autoloaders eliminate the need to manually include class files.

• They use naming conventions to locate and load class files.

• Autoloaders can be registered using spl_autoload_register() function.

• Composer provides a default autoloader for PHP projects.

Abstract classes and interfaces are used to define common methods and properties for classes to implement.

• Abstract classes cannot be instantiated and can contain both abstract and non-abstract methods.

• Interfaces only contain method signatures and constants, and classes can implement multiple interfaces.

• Abstract classes are useful for creating a base class with common functionality, while interfaces are useful for defin...read more

The .htaccess file is used to configure web server settings for a specific directory.

• Used to set up redirects and rewrite rules

• Can restrict access to certain files or directories

• Can set custom error pages

• Can enable/disable certain features like caching or compression

I follow PSR coding standards and adhere to best practices.

• I follow PSR-1 and PSR-2 coding standards.

• I use meaningful variable and function names.

• I write clean and readable code.

• I use proper indentation and spacing.

• I avoid using global variables.

• I use comments to explain complex code.

• I adhere to best practices for security and performance.

• For example, I always use prepared statements to prevent SQL injection attacks.