Stdlib: zend_thread_id() phantom — function_exists true on PHP 8.2 reference (ext/standard/basic_functions.c)

[PurHur]

Category

stdlib · php-src-strict

Problem

zend_thread_id() is a PHP 8.4+ builtin. On PHP 8.2 reference profiles function_exists('zend_thread_id') is false. This compiler registers the function unconditionally (function_exists true, callable returns an int).

php-src reference

• php/php-src ext/standard/basic_functions.c — zend_thread_id registration (PHP 8.4)
• php/php-src Zend/zend_API.c — thread id accessor

Repro

test/repro/maintainer_gap_zend_thread_id_phantom.php

./script/docker-exec.sh -- bash -lc 'php test/repro/maintainer_gap_zend_thread_id_phantom.php; echo exit:$?'
./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_gap_zend_thread_id_phantom.php; echo exit:$?'

Runtime	Output
Zend 8.2	ok
VM	fail: function_exists('zend_thread_id') true on reference profile

Implementation hints (PHP-in-PHP)

• Gate registration on target PHP version / capability matrix (same pattern as other 8.4-only builtins)
• When enabled (8.4 profile), return OS thread id via thin POSIX/FFI helper — no permanent C builtin table growth
• Update script/capability-matrix.php notes

Done when

• Repro ok on VM when reference profile is PHP 8.2
• Function available and matches Zend when project targets PHP 8.4
• function_exists / get_defined_functions agree with php-src for active profile

[PurHur]

claim: PHP Runtime → PHP — batch (issues #11842, #11826, #11846)

[PurHur]

Merged via #11848. Verification: repro ok on Zend 8.2 + VM; CompilerVersionBuiltinAdvertisementTest + zend_thread_id_phantom compliance green.