Summary of Changes

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This pull request significantly enhances the aliasing capabilities, particularly for namespaced functions and constants. It refactors the core alias generation to properly handle symbols within their respective namespaces, ensuring that original function and constant names remain callable after code transformations. This change improves the compatibility and reliability of the generated alias files.

Highlights

• Improved Namespaced Function Aliasing: The core alias generation logic has been significantly refactored to correctly create aliases for functions residing within specific PHP namespaces. This ensures that original namespaced functions can still be called via their old names after being moved or prefixed, by generating an alias within their original namespace that points to the new, prefixed location.
• Separate Handling for Global and Namespaced Symbols: The alias generation process now distinguishes between global functions/constants and namespaced functions. Global symbols are aliased within a namespace {} block, while namespaced functions are aliased within their respective namespace <namespace_name> {} blocks, ensuring proper scope and functionality.
• Refined Function Prefixing Logic: The ChangeEnumerator now explicitly skips functions that are already defined within a namespace when applying the classmap prefix. This means the prefixing mechanism is now correctly applied only to global functions, preventing unintended modifications to namespaced functions.
• Enhanced Test Coverage: A new dedicated unit test (test_namespaced_functions) has been added to the AliasesTest suite. This test specifically validates the correct generation and behavior of aliases for namespaced functions, improving the overall robustness and reliability of the aliasing feature.