In PHP, how do I reduce arrays in a high-traffic application?

In a high-traffic PHP application, efficiently reducing arrays can significantly improve performance. Here are several techniques that can be applied:

• Using array functions: Utilize built-in functions like array_map, array_filter, and array_reduce for efficient operations.
• Limit array size: Only keep the required elements in the array to minimize memory usage.
• Caching: Implement caching strategies to avoid redundant array calculations.
• Optimization: Look into optimizing your algorithms to minimize the need for large arrays.
• Using Generators: Generators can yield values one at a time and thus help reduce memory footprint.