What are the potential pitfalls of using class names without namespaces in PHP, like the example of the Normalizer class?

When using class names without namespaces in PHP, there is a risk of naming conflicts with classes from other libraries or frameworks. To avoid this issue, it is recommended to use namespaces to organize your classes and prevent collisions with classes of the same name.

namespace MyNamespace;

class Normalizer {
    // Class implementation here
}