http_response_code() — internals

http_response_code() — internals

Where it lives

• Signature: src/builtins/system/http_response_code.rs
• Lowering: src/codegen/lower_inst/builtins/system.rs:264 (lower_http_response_code)
• Function symbol: lower_http_response_code()

Lowering notes

• Lowers http_response_code([$code]) to __rt_http_response_code. The code (or
• 0 = “read current” when omitted) goes into the first integer argument register;
• the routine returns the resulting status as an int. PHP semantics (read vs set,
• return-previous) live in the bridge’s elephc_web_set_status.

Runtime helpers

The following runtime helpers are referenced:

• __rt_header
• __rt_http_response_code

Signature summary

function http_response_code(int $response_code = 0): int

What the type checker enforces

• Arity: takes 0–1 arguments (1 optional).

Eval interpreter (magician)

• Declaration: crates/elephc-magician/src/interpreter/builtins/time/http_response_code.rs (eval_builtin!)
• Dispatch hooks: direct, values

Cross-references

• User reference for http_response_code()