Regression: extension_loaded('soap') + SoapClient/SoapServer/SoapFault class_exists on default profile — Zend false (ext/soap)

[PurHur]

Category

Stdlib · php-src-strict · extension advertisement (pairs #3724 SoapClient subset; same shape as #22790 / #22791)

Problem

On a host Zend build without ext/soap, extension_loaded('soap') and class_exists('SoapClient'|'SoapServer'|'SoapFault', false) are all false. The VM advertises soap as loaded and materializes all three classes on the default (8.2 reference) profile.

This is distinct from #3724 (implement SoapClient behavior). Workers should gate advertisement / class registration to match Zend’s loaded-module set first; subset API work stays on #3724.

Probed 2026-07-24 (host PHP 8.2.32, soap absent).

Repro	Zend 8.2+ (no soap)	VM (2026-07-24)
extension_loaded('soap')	false	true
class_exists('SoapClient', false)	false	true
class_exists('SoapServer', false)	false	true
class_exists('SoapFault', false)	false	true

php-src reference

• php/php-src ext/soap/soap.c — module + class registration
• php/php-src ext/standard/dl.c / basic_functions.c — extension_loaded introspection

PHP implementation target

• ext/soap module registration / CompilerVersion / extension policy: do not advertise soap or register SoapClient/SoapServer/SoapFault when the reference profile’s Zend build would not load soap
• Keep real SoapClient semantics work on Stdlib: ext/soap — SoapClient subset (ext/soap parity) #3724 once advertisement matches
• PHP in ext/soap + lib/; no new C runtime branches

Repro

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

Done when

• On default/reference profile matching a Zend build without soap: extension_loaded('soap') false and the three Soap* classes are not class_exists(..., false)
• When soap is intentionally enabled for a profile/build, advertisement and classes return true together
• Compliance .phpt under test/compliance/cases/
• php-src-strict; no php-compiler-strict shortcut

[PurHur]

Self-contained repro (no tree file required)

./script/docker-exec.sh -- bash -lc "php -r 'echo extension_loaded(\"soap\")?\"ext=yes\\n\":\"ext=no\\n\"; echo class_exists(\"SoapClient\",false)?\"SoapClient=yes\\n\":\"SoapClient=no\\n\";'"
./script/docker-exec.sh -- bash -lc "php bin/vm.php -r 'echo extension_loaded(\"soap\")?\"ext=yes\\n\":\"ext=no\\n\"; echo class_exists(\"SoapClient\",false)?\"SoapClient=yes\\n\":\"SoapClient=no\\n\";'"

[PurHur]

claim: PHP Compiler STD Lib Advanced — batch (issues #22841, #22859, #22860)

Starting with #22841 (positive VmStatCache / filesize·filemtime retention). Then sequential PRs for soap/gmp default-profile advertisement gates.

[PurHur]

Merged via #22997

Verification: VM default matches Zend (soap + Soap* + is_soap_fault all false); PHP_COMPILER_PROFILE=8.4 re-enables; phantom PHPT + SoapExtensionPolicyTest green; inventory OK 6518/6518.

Enable: host php-soap or PHP_COMPILER_PROFILE=8.4.