Regression: round Reflection — num float not int|float; mode default 0 not PHP_ROUND_HALF_UP (ext/standard/math.stub.php) #24825

Category

stdlib · php-src-strict · Reflection stubs

Problem

ReflectionFunction('round') diverges from php-src on the num parameter type and the mode default (2026-07-29, fd3b1fedc). Zend defaults mode to PHP_ROUND_HALF_UP (1); VM defaults to 0.

php-src reference

• php/php-src ext/standard/math.stub.php — round signature
• php/php-src ext/standard/math.c — PHP_FUNCTION(round) / PHP_ROUND_HALF_UP

PHP implementation target

• ext/standard Reflection metadata for round — num: int|float, mode default PHP_ROUND_HALF_UP (1)
• PHP-in-PHP only; no new C

Repro

./script/docker-exec.sh -- bash -lc 'php test/repro/round_reflection_parity.php; php bin/vm.php test/repro/round_reflection_parity.php'

Done when

• Reflection matches Zend for num union and mode default 1
• Guard test; php-src-strict