What potential pitfalls can arise from not utilizing namespaces effectively in PHP development?

Not utilizing namespaces effectively in PHP development can lead to naming conflicts, making it difficult to manage code and causing errors. To avoid this, it is important to use namespaces to organize classes and prevent naming collisions with classes from other libraries or frameworks.

// Example of utilizing namespaces effectively in PHP development

// Define namespace for your classes
namespace MyNamespace;

class MyClass {
    // Class implementation
}

// Using the class from the defined namespace
$obj = new MyNamespace\MyClass();