Regression: extension_loaded('opcache') true / 'Zend OPcache' false — Zend inverted names (ext/opcache) #24993

Category

stdlib · php-src-strict · extension registry / opcache name

Problem

On a stock Zend 8.2 CLI build, extension_loaded('Zend OPcache') is true and extension_loaded('opcache') is false. php-compiler inverts the names: 'opcache' loads as true and 'Zend OPcache' as false. function_exists('opcache_get_status') is true on both sides, so this is a registry name mismatch, not absence of the API.

Probed 2026-07-29 Zend 8.2.32 vs bin/vm.php @ a4c54c0ef.

php-src reference

• php/php-src ext/opcache/zend_accelerator_module.c — module name "Zend OPcache"
• php/php-src ext/standard/dl.c / get_loaded_extensions — extension_loaded lookup by module name

PHP implementation target

• Extension registry / extension_loaded mapping in ext/ or lib/ — register the Zend module name Zend OPcache (and stop advertising bare opcache unless Zend does on that profile)
• PHP-in-PHP; no new C

Repro

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

Done when

• extension_loaded('opcache') / extension_loaded('Zend OPcache') match Zend on the reference profile
• Compliance or repro guard; php-src-strict