How to Properly Use \'use\' Statements with PHP Namespaces?

PHP Namespaces and "use" Statements

When working with PHP namespaces, it's important to understand the "use" statement and its functionality. This question addresses some common issues encountered while using namespaces and "use" statements.

The "use" statement allows you to import namespaces or class aliases into your current namespace. In the given example, the developer is encountering an error when attempting to use the "use" statement to alias the "ShapeInterface" and "Shape" classes.

The error arises because the "use" statement is not intended to replace class loading. To avoid this error, it's recommended to use the following approach:

1. Register an Autoloader: Implement a PSR-4 autoloader to automatically load classes when they are referenced. This eliminates the need for explicit "include" or "require" statements.
2. Use Namespace Prefixing: Utilize namespace prefixes consistently throughout your code. In this case, all classes are within the "Shape" namespace, so using "Shape" before each class name ensures they resolve to their respective namespace.

By following these guidelines, you can effectively use namespaces and "use" statements to organize and alias classes in your PHP applications.

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