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Promoted property constructor parameter compatibility checks

Group: Properties · Category: language · File: properties_promoted_param_mismatch.php

References: - PHP constructor property promotion

Analyzer results

AnalyzerVersionResultDiagnostics
phan 6.0.7Phan 6.0.7 php-ast version 1.1.3 PHP version used to run Phan: 8.5.9 Pass
properties_promoted_param_mismatch.php:23: Argument 1 ($id) is 'x' of type string but \Conformance\Tests\PropertiesPromotedParamMismatch\IdBox::__construct() takes int defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/properties_promoted_param_mismatch.php:16 [PhanTypeMismatchArgumentReal]
phpstan 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Pass reported Lv.5+
properties_promoted_param_mismatch.php:23: Parameter #1 $id of class Conformance\Tests\PropertiesPromotedParamMismatch\IdBox constructor expects int, string given. [identifier=argument.type] [reported-from-level=5]
With strict-rules
properties_promoted_param_mismatch.php:23: Parameter #1 $id of class Conformance\Tests\PropertiesPromotedParamMismatch\IdBox constructor expects int, string given. [identifier=argument.type]
psalm 6.16.1Psalm 6.16.1@f1f5de594dc76faf8784e02d3dc4716c91c6f6ac
next: 7.0.0-beta19
Pass
properties_promoted_param_mismatch.php:23: Argument 1 of Conformance\Tests\PropertiesPromotedParamMismatch\IdBox::__construct expects int, but 'x' provided [InvalidScalarArgument]
mago 1.46.0mago 1.46.0 Pass
properties_promoted_param_mismatch.php:23: Invalid argument type for argument #1 of `Conformance\Tests\PropertiesPromotedParamMismatch\IdBox::__construct`: expected `int`, but found `string('x')`. [invalid-argument]
mir 0.70.1mir 0.70.1 Pass
properties_promoted_param_mismatch.php:23: UnusedVariable: Variable $bad is never read [MIR0500]
properties_promoted_param_mismatch.php:23: InvalidArgument: Argument $id of Conformance\Tests\PropertiesPromotedParamMismatch\IdBox::__construct() expects 'int', got '"x"' [MIR0201]
phpantom 0.9.0phpantom_lsp 0.9.0 Pass
properties_promoted_param_mismatch.php:23: Argument 1 ($id) expects int, got 'x' [type_mismatch_argument]
intelephense 1.18.5intelephense 1.18.5 Pass
properties_promoted_param_mismatch.php:23: Expected type 'int'. Found ''x''. [P1006]
phpy 0.2.0phpy 0.2.0 Pass
properties_promoted_param_mismatch.php:23: Argument '1' passed to __construct() is expected to be of type int, string given
qodana 262.8665.325Qodana 262.8665.325 Pass
properties_promoted_param_mismatch.php:23: Parameter ''x'' type is not compatible with declaration when using strict type matching [PhpParamsInspection]
properties_promoted_param_mismatch.php:23: Parameter ''x'' type is not compatible with declaration [PhpStrictTypeCheckingInspection]
noverify 0.5.5NoVerify, version 0.5.5: built on: 2025.04.22 14:36:46 OS: r-kuchinskas arm64 Commit: 4774b82f8adc53fbef38f95e97af4b953b4d1529 Fail

No diagnostics reported.

Expectation diff
Line 23: Expected 1 error(s)
steins 0.1.5steins 0.1.5 (2026-08-12 revision 39b4cc1) Pass
properties_promoted_param_mismatch.php:23: argument "x" to IdBox::__construct() cannot become int $id — proven TypeError (strict mode) [type.argument-mismatch]
phpstan-strict 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Pass
properties_promoted_param_mismatch.php:23: Parameter #1 $id of class Conformance\Tests\PropertiesPromotedParamMismatch\IdBox constructor expects int, string given. [identifier=argument.type]
psalm-next 7.0.0-beta19Psalm 7.0.0-beta19@7e751c06a756fa64dc4c759c09fe4a173afcb433 Pass
properties_promoted_param_mismatch.php:23: Argument 1 of Conformance\Tests\PropertiesPromotedParamMismatch\IdBox::__construct expects int, but 'x' provided [InvalidScalarArgument]

Source

<?php

declare(strict_types=1);

namespace Conformance\Tests\PropertiesPromotedParamMismatch;

/**
 * Promoted property constructor parameter compatibility checks.
 *
 * References:
 * - PHP constructor property promotion
 */

final class IdBox
{
    public function __construct(
        public int $id,
    ) {
    }
}

$ok = new IdBox(1);
$bad = new IdBox('x'); // E: string is not accepted by promoted int property parameter
echo $ok->id;