Regression: Locale/NumberFormatter/IntlCalendar/ResourceBundle class_exists true without ext/intl (re-#19670, ext/intl/php_intl.c)

[PurHur]

Category

stdlib · php-src-strict · intl OOP phantoms (pillar 4)

Problem

Host Zend without ext/intl reports class_exists('Locale'|'NumberFormatter'|'IntlCalendar'|'ResourceBundle', false) === false and function_exists('transliterator_create'|'intl_get_error_code') === false. The VM registers these names anyway (same for PHP_COMPILER_PROFILE=8.4), regressing closed #19670 / #16214.

Sibling of the extension_loaded('intl') phantom (re-#11472) — fix registration so OOP/procedural intl symbols are absent unless the extension is honestly loaded.

Probed 2026-07-23 on master VM vs host Zend 8.2.32.

Repro	Zend 8.2+ (no intl)	VM / VM PROFILE=8.4
class_exists('Locale', false)	false	true
class_exists('NumberFormatter', false)	false	true
class_exists('IntlCalendar', false)	false	true
class_exists('ResourceBundle', false)	false	true
function_exists('transliterator_create')	false	true
function_exists('intl_get_error_code')	false	true

php-src reference

• php/php-src ext/intl/php_intl.c — MINIT registers classes only when module loads
• php/php-src ext/intl/locale/ — Locale / NumberFormatter / calendar / resourcebundle

PHP implementation target

• ext/intl/ Module / autoload registration — gate class + function registration on real intl availability (or profile-honest intl), matching Zend class_exists/function_exists
• PHP-in-PHP only

Repro

./script/docker-exec.sh -- bash -lc 'php bin/vm.php -r '"'"'
foreach (["Locale","NumberFormatter","IntlCalendar","ResourceBundle"] as $c) {
  echo "$c=", class_exists($c, false) ? "Y" : "N", "\n";
}
foreach (["transliterator_create","intl_get_error_code"] as $f) {
  echo "$f=", function_exists($f) ? "Y" : "N", "\n";
}
'"'"''
# Zend: all N; VM today: all Y

Done when

• Listed classes/functions absent when Zend without intl would report them absent
• Compliance .phpt guard
• php-src-strict; no php-compiler-strict shortcut

[PurHur]

Sibling phantom-registration gap: #22691 (extension_loaded('intl')). Gate probe: see #22691 comment (#10533 comments locked).

[PurHur]

Note: #22744 (merged as c860c694f for #22691) clears the same host-extension_loaded('intl') gate that drove Locale / NumberFormatter / other intl OOP phantoms — so those class phantoms should no longer advertise when php-intl is absent.

This comment is only a cross-link; #22691 owns the merge. Please verify / close #22692 separately if the OOP cases are covered to your satisfaction.