Stdlib: error_log() — VM/JIT/AOT (closes #3380)

[PurHur]

Summary

• Implement error_log() per php-src ext/standard/basic_functions.c::_php_error_log in PHP (ext/standard/error_log.php, VmErrorLog.php).
• Type 0/4/default writes to stderr via fprintf; type 3 appends via __compiler_file_put_contents / JitFilePutContents lowering.
• Register in Module.php; capability matrix row added; compliance + AOT fixture + unit tests.

php-src reference

• ext/standard/basic_functions.c — PHP_FUNCTION(error_log) / _php_error_log

Verification

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php bin/vm.php -r "var_export(function_exists(\"error_log\"));"'
# bool(true)

vendor/bin/phpunit --filter ErrorLogBuiltinTest
# OK (5 tests)

vendor/bin/phpunit --filter "stdlib/error_log"
# OK (2 tests — VM + JIT compliance)

php bin/vm.php test/repro/maintainer-error_log.php
# stderr: hello from error_log; stdout: ok + file msg

php bin/compile.php -l test/repro/maintainer-error_log.php
# lint exit 0

php bin/compile.php -o /tmp/el_aot test/repro/error_log_aot_type3.php && /tmp/el_aot
# AOT type-3 append OK (file created)

php bin/jit.php test/repro/maintainer-error_log.php
# JIT OK

Closes #3380

Made with Cursor