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Regression: fadd/fsub/fmul/fmax/fmin/nextafter Reflection arity 0 — Zend float stubs (ext/standard/math.stub.php) #27617
Description
Category
Regression · php-src-strict · Reflection / PHP 8.4 math builtins
Problem
Under PHP_COMPILER_PROFILE=8.4, the IEEE float builtins fadd / fsub / fmul / fmax / fmin / nextafter are callable (positional works) but Reflection reports 0 parameters and no return type. Zend named args (num1 / num2, fmax value / ...values) therefore fail with Unknown named parameter.
Distinct from #25459 (max/min/pow/fdiv/fmod) and #27600 (fpow/bcdivmod).
| Surface (PROFILE=8.4, 2026-08-04) | Zend 8.4 stubs | VM |
|---|---|---|
ReflectionFunction('fadd')->getNumberOfParameters() |
2 |
0 |
| return type | float |
none |
fadd(num1: 1.5, num2: 2.25) |
3.75 |
Error: Unknown named parameter $num1 |
fadd(1.5, 2.25) positional |
3.75 |
3.75 |
Same arity-0 pattern for fsub/fmul/fmax/fmin/nextafter.
php-src reference
- php/php-src
ext/standard/math.stub.php—fadd/fsub/fmul/fmax/fmin/nextafter - php/php-src
ext/standard/math.c—zend_fadd/zend_fmax/php_nextafter
PHP implementation target
lib/BuiltinInternalArgInfo.php/lib/BuiltinParamNames.php— add Zend stub rows (missing today;fmod/fpowpartially covered)ext/standard/fadd.php(+fsub/fmul/fmax/fmin/nextafter) — ensure Reflection registration matches stubs- PHP-in-PHP; no new
runtime/*.c
Repro
./script/docker-exec.sh -- bash -lc 'PHP_COMPILER_PROFILE=8.4 php bin/vm.php test/repro/maintainer_gap_fadd_fmax_nextafter_reflection.php'Done when
- Reflection arity/types/names match Zend stubs for all six builtins
-
fadd(num1:…, num2:…)andfmax(value:…, …)accept Zend named args - Compliance
.phptReflection + named-arg smoke under PROFILE=8.4 - php-src-strict; no php-compiler-strict shortcut
Activity
PurHur commentedon Aug 7, 2026
Maintainer note (2026-08-07): live
php:8.4-cli8.4.24 andphp:8.5-cli8.5.8 reportfunction_exists('fadd'|'fmax'|'nextafter'|…) === false. These are not Zend stub surfaces to Reflection-fix — they are phantoms. Tracking removal/gating in #28565. This issue’s “match Zend float stubs” premise should be closed or rewritten against #28565 done-when.PurHur commentedon Aug 7, 2026
Closing as not planned: Zend 8.4/8.5 do not ship these builtins. Phantom removal tracked in #28565.