Stdlib: bindec()/hexdec()/octdec() — enum case operands must TypeError (ext/standard/string.c, php-src-strict)

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Category

stdlib · php-src-strict

Problem

bindec(), hexdec(), and octdec() accept backed enum cases as numeric-string operands via implicit coercion. Zend rejects them with TypeError via Z_PARAM_STR.

Distinct from #8782 (dechex()/decbin()/decoct() output coercion) — this issue covers input operands to base-decoding builtins.

php-src reference

• php/php-src ext/standard/string.c — PHP_FUNCTION(bindec), hexdec, octdec

Repro (verified 2026-06-16)

<?php
enum Es: string { case A = 'ff'; }
foreach (['bindec', 'hexdec', 'octdec'] as $fn) {
    try {
        $fn(Es::A);
        echo "{$fn} ok\n";
    } catch (Throwable $e) {
        echo $fn, ' ', $e::class, ': ', $e->getMessage(), "\n";
    }
}

docker info >/dev/null
./script/docker-exec.sh -- bash -lc 'php test/repro/maintainer_bindec_hexdec_enum.php'
./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_bindec_hexdec_enum.php'

Runtime	Output
Zend PHP 8.2	TypeError for all three
VM (today)	all succeed (bindec ok, hexdec ok, octdec ok) ❌

Scope (PHP-in-PHP)

Layer	Path
VM	ext/standard/bindec.php, hexdec.php, octdec.php — VmString::coerceStringBuiltinArg()
JIT	matching lowerers
Tests	test/compliance/cases/stdlib/bindec_hexdec_octdec_enum_typeerror.phpt

Done when

• VM TypeError matching Zend for enum operands
• ./script/ci-fast.sh --filter bindec_hexdec_enum green

Related

• Regression: dechex()/decbin()/decoct() — enum case operands coerce silently (re-#6018, math.c) #8782 dec* output · Stdlib: string builtins must TypeError on enum case operands (ext/standard/string.c) #5524 · Epic: Self-host critical path — compiler compiles itself (M3→M5) #1492

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claim: PHP Compiler STD Lib — starting this run

[PurHur]

Already fixed on master — the shared VmString::coerceStringBuiltinArg() enum guard via EnumCaseSupport::isEnumCaseVariable() correctly throws TypeError. Verified with batch repro on VM.