unserialize() — internals

unserialize() — internals

Where it lives

• Signature: src/builtins/system/unserialize.rs
• Lowering: src/codegen/lower_inst/builtins/serialize.rs:164 (lower_unserialize)
• Function symbol: lower_unserialize()

Lowering notes

• Lowers unserialize($data, $options?) into the shared unserialize runtime helper.
• The source string is parsed by __rt_unserialize_mixed; a null result pointer
• (parse error or unsupported wire form) is boxed as PHP false. The optional
• $options argument is accepted but currently ignored.

Runtime helpers

The following runtime helpers are referenced:

• __rt_mixed_cast_string
• __rt_unserialize_begin
• __rt_unserialize_mixed

Signature summary

function unserialize(string $data, mixed $options = []): mixed

What the type checker enforces

• Arity: takes 1–2 arguments (1 optional).

Eval interpreter (magician)

Not callable from eval’d code — the magician interpreter has no entry for this builtin.

Cross-references

• User reference for unserialize()