Worked on enhancing type hinting within the JetBrains/phpstorm-stubs repository by improving the IDE’s understanding of the array_first and array_last functions in PHP. Focused on IDE metaprogramming and static analysis, the contribution introduced template-based input types to ensure that return types are inferred as the element type of the input array. This approach strengthened autocompletion and static analysis for developers without affecting runtime behavior, as all changes were limited to meta definition files. Utilized PHP and advanced type hinting techniques to deliver a targeted feature that improves code analysis workflows for users relying on these array utility functions.