Regression: mb_chr/mb_ord Reflection params empty — Zend codepoint/string; named args rejected (ext/mbstring/mbstring.stub.php)

[PurHur]

Category

bug · php-src-strict · named arguments / Reflection

Problem

mb_chr / mb_ord work positionally, but Reflection exposes zero parameters, so Zend stub named calls fail. Probed 2026-07-26 vs host Zend 8.2.32.

Repro	Zend 8.2	VM (2026-07-26)
Reflection mb_chr	codepoint,encoding	empty
Reflection mb_ord	string,encoding	empty
mb_chr(codepoint:0x41)	A	Unknown named parameter $codepoint
mb_ord(string:'A')	65	Unknown named parameter $string

Related empty Reflection in same extension (optional same PR): mb_scrub, mb_str_split.

php-src reference

• php/php-src ext/mbstring/mbstring.stub.php — mb_chr, mb_ord

PHP implementation target

• lib/BuiltinParamNames.php — stub names
• Existing PHP impl: ext/mbstring/ (mb_chr, mb_ord); PHP-in-PHP only; no new C

Repro

./script/docker-exec.sh -- bash -lc 'php bin/vm.php -r '\''try { echo mb_chr(codepoint:0x41), "\n"; echo mb_ord(string:"A"), "\n"; } catch (Throwable $e) { echo $e->getMessage(), "\n"; }'\'''

Done when

• Reflection names match Zend for mb_chr / mb_ord
• Zend-style named calls match Zend on VM
• Compliance .phpt + test/repro/issue_NNNN_*.php
• php-src-strict; no php-compiler-strict shortcut

[PurHur]

claim: PHP Compiler Ext — I/O & Crypto — starting this run

Pillar 1 (pre-claim):

• bootstrap-inventory --check: green (OK 6565/6565)
• release-readiness --json: running
• No open PR / prior claim on this issue

Implementing Zend stub Reflection param names for mb_chr / mb_ord in lib/BuiltinParamNames.php (php-src ext/mbstring/mbstring.stub.php).

[PurHur]

In progress: PR #23299

Verification so far (Docker):

php bin/vm.php test/repro/issue_23291_mb_chr_ord_named_params.php  → ok
mb_chr(codepoint:0x41) → A ; mb_ord(string:'A') → 65 ; Reflection names match Zend
vendor/bin/phpunit --filter testMbChrOrdZendStubNamedParams → OK
vendor/bin/phpunit --filter named_args_mb_chr_ord → OK (2 tests)
check-selfhost-spine-coverage-sync → OK 6565/6565 (also adds XsltPhpFunctionBridge spine require from #23296)
check-generated-docs → OK

./script/ci-fast.sh still running (AOT build smoke cold-emitting helper units).

[PurHur]

Merged: #23299

Verification:

• php bin/vm.php test/repro/issue_23291_mb_chr_ord_named_params.php → ok
• mb_chr(codepoint:0x41) / mb_ord(string:'A') + Reflection names match Zend
• phpunit testMbChrOrdZendStubNamedParams + named_args_mb_chr_ord (VM+JIT) OK
• spine-coverage OK 6565/6565 (also required XsltPhpFunctionBridge.php from Stdlib: XSLTProcessor php:function() VM userland bridge (#22632) #23296)
• AOT build smoke tier 1 OK
• ci-fast still hits pre-existing check-no-unlimited-memory on test/repro/maintainer_gap_max_memory_limit_ini_85_ceiling.php (master; unrelated)
• north-star5-verify-fast step 4f-m still red on master (stale gen-0 fingerprint; pre-existing)

php-src: ext/mbstring/mbstring.stub.php → lib/BuiltinParamNames.php