[PurHur]

Summary

• array_multisort([1,2], …) and multi-array inline literals now succeed like Zend — ephemeral array operands are allowed for variadic by-ref slots.
• sort([1,2]) and other array mutators still reject inline literals.

Closes #12017

php-src reference

• ext/standard/array.c — php_array_multisort inline array materialization
• Zend/zend_compile.c — ZEND_SEND_REF temp for inline arrays

PHP implementation

• lib/VM/ReferencableCheck.php — allowsEphemeralArrayLiteralByRef('array_multisort')
• lib/JIT.php — variadic by-ref JIT guard parity

Verification

./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_gap_array_multisort_inline_array_flags.php'
# ok

./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_gap_array_multisort_two_inline_arrays.php'
# ok

./script/docker-exec.sh -- bash -lc './vendor/bin/phpunit --filter array_multisort_inline_array'
# OK (4 tests)

./script/docker-exec.sh -- bash -lc 'php bin/compile.php -l test/fixtures/aot/compile-only/array_multisort_inline_array.php'
# (no output — lint ok)

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