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filetype() — internals

Compiler internals for filetype(): lowering path, type checks, and runtime helpers.

filetype() — internals

Where it lives

Lowering notes

  • Lowers filetype(path) and boxes the runtime string-or-false result.

Runtime helpers

The following runtime helpers are referenced:

  • __rt_filetype
  • __rt_lstat_array
  • __rt_stat_array

Signature summary

function filetype(string $filename): mixed

What the type checker enforces

  • Arity: takes exactly 1 argument.

Eval interpreter (magician)

Cross-references