array_is_list() on a keyless tuple shapearray{int, string} has implicit sequential integer keys 0 and 1, so it is always a
list and array_is_list($t) is always true — the counterpart of the always-false
optional-key cases. This records whether each tool treats the keyless tuple as a
guaranteed list (reporting the check as redundantly true, or narrowing silently) and
confirms consistency with the explicit-key list-ness case.
Reference: phpstan#14939| Analyzer | Version | Result | Diagnostics |
|---|---|---|---|
| phan | 6.0.10Phan 6.0.10 php-ast version 1.1.3 PHP version used to run Phan: 8.5.11 | Pass | No diagnostics reported. |
| phpstan | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Pass reported Lv.4+ | regressions_keyless_tuple_is_list.php:22: Call to function array_is_list() with array{int, string} will always evaluate to true. [reported-from-level=4]With strict-rulesregressions_keyless_tuple_is_list.php:22: Call to function array_is_list() with array{int, string} will always evaluate to true. |
| psalm | 6.20.0Psalm 6.20.0@804f03c0c183d149fcd4b8c7c0c9b3fbf836d34c next: 7.0.0-rc2 |
Pass (pzoom≠) | regressions_keyless_tuple_is_list.php:22: Type list{int, string} for $t is always list<mixed> [RedundantCondition]pzoom (Psalm port)No diagnostics from pzoom. |
| mago | 1.57.0mago 1.57.0 | Pass | regressions_keyless_tuple_is_list.php:22: Redundant type assertion: `$t` is already `array{0: int, 1: string}`. [redundant-type-comparison]
regressions_keyless_tuple_is_list.php:22: This condition (type `true`) will always evaluate to true. [redundant-condition] |
| mir | 0.87.0mir 0.87.0 | Pass | regressions_keyless_tuple_is_list.php:22: RedundantCondition: Condition is always false, so the then branch is never reached [MIR0400] |
| phpantom | 0.11.1phpantom_lsp 0.11.1 | Pass | No diagnostics reported. |
| intelephense | 1.18.5intelephense 1.18.5 | Pass | No diagnostics reported. |
| phpactor | 2026.10.07.0Phpactor 2026.10.07.0 | Pass | No diagnostics reported. |
| phpy | 1.0.19409phpy 1.0.19409 | Pass | No diagnostics reported. |
| qodana | 262.10968.76PhpStorm 262.10968.76 | Pass | No diagnostics reported. |
| noverify | 0.5.5NoVerify, version 0.5.5: built on: 2025.04.22 14:36:46 OS: r-kuchinskas arm64 Commit: 4774b82f8adc53fbef38f95e97af4b953b4d1529 | Pass | regressions_keyless_tuple_is_list.php:20: param $t miss matched with phpdoc type <<array{int, string}>> [funcParamTypeMissMatch] |
| steins | 0.1.8steins 0.1.8 (2026-09-21 revision 76306a9) | Pass | No diagnostics reported. |
| phpstan-strict | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Pass | regressions_keyless_tuple_is_list.php:22: Call to function array_is_list() with array{int, string} will always evaluate to true. |
| psalm-next | 7.0.0-rc2Psalm 7.0.0-rc2@20339e3fe5b8d03bcd8061030eb2a83ad50e5783 | Pass | regressions_keyless_tuple_is_list.php:22: Type list{int, string} for $t is always list<mixed> [RedundantCondition] |
<?php
declare(strict_types=1);
namespace Conformance\Tests\RegressionsKeylessTupleIsList;
/**
* `array_is_list()` on a keyless tuple shape.
*
* `array{int, string}` has implicit sequential integer keys 0 and 1, so it is always a
* list and `array_is_list($t)` is always true — the counterpart of the always-false
* optional-key cases. This records whether each tool treats the keyless tuple as a
* guaranteed list (reporting the check as redundantly true, or narrowing silently) and
* confirms consistency with the explicit-key list-ness case.
*
* Reference: https://github.com/phpstan/phpstan/discussions/14939
*/
/** @param array{int, string} $t */
function keylessTupleIsList(array $t): void // E<noverify>: NoVerify does not parse array shape syntax and flags the annotation itself
{
if (array_is_list($t)) { // E<phpstan>: correctly always-true — keyless tuple is a list (function.alreadyNarrowedType) // E<phpstan-strict>: same always-true verdict // E<psalm>: RedundantCondition — always a list // E<mago>: redundant-condition — always true // E<mir>: RedundantCondition. Phan emits no redundancy note. Contrast with the always-false optional-key bug
echo "always reached — a keyless tuple is a list\n";
}
}
keylessTupleIsList([1, 'x']);