Stdlib: fputcsv() fields array with enum case must Error like Zend (ext/standard/file.c)

Problem

fputcsv($handle, [E::A]) must throw Error: Object of class E could not be converted to string (php-src). VM either throws LogicException when the return is used, or silently skips the call when the return is discarded (#5896).

php-src reference

php/php-src ext/standard/file.c — php_fputcsv() field serialization

Repro (add `test/repro-maintainer/parity_fputcsv_enum_field.php`)

<?php
enum E: string { case A = 'a'; }
$fp = fopen('php://memory', 'r+');
try {
    $n = fputcsv($fp, [E::A]);
    rewind($fp);
    echo "n=$n line=", stream_get_contents($fp);
} catch (Throwable $e) {
    echo get_class($e), ': ', $e->getMessage(), PHP_EOL;
}
fclose($fp);

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php8.2 test/repro-maintainer/parity_fputcsv_enum_field.php
php bin/vm.php test/repro-maintainer/parity_fputcsv_enum_field.php'

Engine	Behavior
Zend	`Error` on enum object in fields
VM	`LogicException` when `$n = …` assigned; no throw for bare `fputcsv(...)` statement (#5896)

Scope

ext/standard/fputcsv.php — detect TYPE_ENUM_CASE in fields loop; throw Error with Zend message (not LogicException)
ext/standard/VmFs.php — keep PHP path; no new runtime/*.c
JIT: JitFputcsv.php when enum fields can reach native lowering

php-src-strict

Enum case objects are not strings; do not coerce backing scalar.

Done when

Repro matches Zend Error on VM (void and assigning contexts after Stdlib: VM builtins skip arg validation when return is discarded (returnVar null early-return) #5896)
Compliance PHPT fputcsv_enum_field.phpt green

Stdlib: VM builtins skip arg validation when return is discarded (returnVar null early-return) #5896, Stdlib: fputcsv() — enclosure/escape edge cases + ValueError parity (ext/standard/file.c) #4530, Stdlib: string builtins must TypeError on enum case operands (ext/standard/string.c) #5524

claim: PHP Runtime → PHP — starting this run (#5898: fputcsv enum field Error parity).

Unclaiming: fputcsv() enum field Error already green on master (VM + void context via BuiltinExecute::writeReturn). Zend and bin/vm.php both print Error: Object of class E could not be converted to string. Recommend closing as duplicate unless repro differs.

unclaim: stale claim (>7 days, no open PR). Returning to implementation-ready queue for workers (maintainer sweep 2026-07-19).

unclaim: stale claim (>7 days, no PR). Returning to queue for workers.

unclaim: stale — last claim: was 2026-06-11 with no open PR and no further activity. Returning to implementation-ready queue for workers.

claim: PHP Compiler STD Lib Advanced — batch (issues #21174, #21179, #5898)

Sequential PRs: str_getcsv escape E_DEPRECATED → fgetcsv/fputcsv escape E_DEPRECATED → fputcsv enum field Error. Merge each before the next.

Test: lock fputcsv enum field Error parity (#5898) (#21206)

merged: #21206

Verification: VM+JIT already throw Zend Error for enum fields (assign + void) via VmFputcsv::coerceFieldCell. Added repro + compliance PHPT; VMTest OK (2).

Batch complete: #21174, #21179, #5898 all merged.

Status check (stdlib worker)

Repro already matches Zend on current master (VM + void context):

Error: Object of class E could not be converted to string
void:Error: Object of class E could not be converted to string

Closing as already fixed (prior unclaim noted same). Batch #21174/#21179 complete; moving to #20635 null→TypeError string cluster.

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Stdlib: fputcsv() fields array with enum case must Error like Zend (ext/standard/file.c) #5898

Category

Problem

php-src reference

Repro (add `test/repro-maintainer/parity_fputcsv_enum_field.php`)

Scope

php-src-strict

Done when

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Stdlib: fputcsv() fields array with enum case must Error like Zend (ext/standard/file.c) #5898

Description

Category

Problem

php-src reference

Repro (add test/repro-maintainer/parity_fputcsv_enum_field.php)

Scope

php-src-strict

Done when

Related

Activity

PurHur commented on Jun 11, 2026

PurHur commented on Jun 11, 2026

PurHur commented on Jul 19, 2026

PurHur commented on Jul 19, 2026

PurHur commented on Jul 19, 2026

PurHur commented on Jul 19, 2026

PurHur commented on Jul 20, 2026

PurHur commented on Jul 20, 2026

Status check (stdlib worker)

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Issue actions

Repro (add `test/repro-maintainer/parity_fputcsv_enum_field.php`)