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htmlentities() — internals

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

htmlentities() — internals

Where it lives

Lowering notes

  • Lowers htmlspecialchars() / htmlentities() — escapes the subject string (operand 0).
  • name is the calling builtin’s PHP name, used in argument-coercion diagnostics. The
  • optional flags and encoding arguments are accepted (so the common `htmlspecialchars($s,
  • ENT_QUOTES)call form compiles) but not applied:__rt_htmlspecialchars` implements the
  • ENT_QUOTES behaviour, which matches PHP’s default flag set and the overwhelmingly-common
  • ENT_QUOTES call. (A flag-aware runtime — doctype-dependent ' vs ' — is a follow-up.)

Runtime helpers

The following runtime helpers are referenced:

  • __rt_grapheme_strrev
  • __rt_htmlspecialchars
  • __rt_strcopy

Signature summary

function htmlentities(string $string, int $flags = 11, string $encoding = 'UTF-8'): string

What the type checker enforces

  • Arity: takes 1–3 arguments (2 optional).

Eval interpreter (magician)

Cross-references