What are some key differences between namespaces in PHP and Java, and how can they impact development in Zend Framework?

One key difference between namespaces in PHP and Java is that PHP namespaces are declared using the `namespace` keyword at the beginning of a file or within a class, while Java packages are declared using the `package` keyword at the beginning of a file. This can impact development in Zend Framework because Zend Framework uses PHP namespaces extensively for organizing classes and resolving naming conflicts. To resolve any namespace conflicts in Zend Framework, make sure to properly define namespaces for your classes and use the `use` keyword to import namespaces when necessary.

namespace MyNamespace;

use AnotherNamespace\SomeClass;

class MyClass {
    // Class implementation here
}