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Regression: StringTrimMode phantom on PROFILE≥8.4 — absent from php-src (re-#7283, ext/standard/string.stub.php) #28202
Description
Category
bug · php-src-strict · builtin stub enums · pillar 4
Problem
Under PHP_COMPILER_PROFILE=8.4 / 8.5, VM registers int-backed enum StringTrimMode (Both/Left/Right) for trim()/ltrim()/rtrim() (#7283). php-src has no StringTrimMode — those builtins take string $characters = " \n\r\t\v\0" only (no mode enum parameter).
Probed 2026-08-06 @ 12bda25e052b.
| Repro | Zend php-src 8.4+ | VM PROFILE=8.4 |
|---|---|---|
enum_exists('StringTrimMode') |
false |
true |
StringTrimMode::cases() |
n/a | Both,Left,Right |
php-src reference
- php/php-src
ext/standard/string.stub.php—trim/ltrim/rtrimsignatures (string$charactersonly) - History: Stdlib: StringTrimMode enum — PHP 8.4 trim()/ltrim()/rtrim() side parameter missing (string.c) #7283
PHP implementation target
ext/standard/BuiltinEnums.php::registerStringTrimMode— withhold under php-src-strictext/standard/VmString.php(tryStringTrimModeBitmask) — do not accept enum mode on php-src-strictlib/JIT/Builtin/StringTrimModeJit.php— gate enum path- PHP-in-PHP; no C runtime growth
Repro
./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
cat > /tmp/stringtrimmode_phantom.php <<"PHP"
<?php
echo "enum_exists=", enum_exists("StringTrimMode") ? "true" : "false", "\n";
PHP
PHP_COMPILER_PROFILE=8.4 php bin/vm.php /tmp/stringtrimmode_phantom.php'
# Expect: enum_exists=falseDone when
-
enum_exists('StringTrimMode')isfalseon PROFILE 8.4/8.5 -
trim/ltrim/rtrimmatch Zend arity/types - Compliance/
test/reproguard; php-src-strict
Activity
PurHur commentedon Aug 6, 2026
claim: PHP Compiler STD Lib — starting this run
Retiring phantom
StringTrimModeunder php-src-strict (re-#7283), restoring Zend arity fortrim/ltrim/rtrim(also closes #28230 call-site observable). Pattern: #28203/#28218 SessionStatus.Trust probe (this host):
php script/bootstrap-inventory.php --check→ OK 7168/7168. release-readiness still running.PurHur commentedon Aug 8, 2026
unclaim: stale claim (~33h, no open PR, no
agent/*/fix/*branch on the remote — onlymasterremains). Returning toimplementation-readyfor a fresh worker.Cleanup bot: paired with #28230 (same phantom
$mode/StringTrimModeretirement). No evidence of landed work for this claim.PurHur commentedon Aug 8, 2026
claim: PHP Compiler STD Lib Advanced — batch replacement after #27827 already-fixed (issues #28202, #28230)
Root cause: phantom StringTrimMode + 3rd
$modeon trim/ltrim/rtrim. One PR closes both (#28202 enum, #28230 ArgumentCountError).Stdlib: retire phantom StringTrimMode; trim arity ≤2 (#28202, #28230) (…
PurHur commentedon Aug 8, 2026
Merged #28959
Verification:
PHP_COMPILER_PROFILE=8.4Zend/VM/JIT —enum_exists('StringTrimMode')===false;trim(' x ',' ',true)→ArgumentCountError: … at most 2 arguments, 3 given. Unit + advertisement guard green.