Stdlib: extension_loaded('ldap') reports true without Zend ext/ldap — phantom extension gate (ext/ldap/php_ldap.c) #17680

Category

stdlib · php-src-strict

Problem

php-src registers ext/ldap symbols only when the ldap extension is actually loaded. On hosts without php-ldap, Zend reports extension_loaded('ldap') === false. This compiler unconditionally reports extension_loaded('ldap') === true while shipping PHP stubs under ext/ldap/, breaking extension-introspection parity and code that gates on extension_loaded before calling ldap APIs.

php-src reference

• php/php-src ext/ldap/php_ldap.c — php_module_entry, extension registration
• php/php-src ext/standard/basic_functions.c — extension_loaded() semantics

PHP implementation target

• ext/ldap/ registration — tie extension_loaded('ldap') and function_exists('ldap_*') to the same gate Zend uses (extension table), not unconditional stub export
• Avoid new C in runtime/; keep ldap semantics in PHP stubs behind the extension gate

Repro

./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_gap_ldap_extension_loaded_phantom.php'
# Also: php bin/vm.php test/repro/maintainer_gap_ldap_escape_phantom_function_exists.php

Done when

• Both repro scripts print ok on VM/JIT/AOT on hosts without Zend ext/ldap
• When ldap is intentionally enabled, ldap_escape() smoke still works
• Compliance guard under test/compliance/cases/extensions/ldap_extension_loaded.phpt
• php-src-strict; no php-compiler-strict shortcut