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Basic class constant value compatibility checks

Group: Constants · Category: language · File: constants_class_constant_type.php

References: - PHP class constants

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
constants_class_constant_type.php:24: Argument 1 ($value) is HttpStatus::OK of type int (value: 200) (real type int) but \Conformance\Tests\ConstantsClassConstantType\takesString() takes string defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/constants_class_constant_type.php:19 [PhanTypeMismatchArgumentReal]
phpstan 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Pass reported Lv.5+
constants_class_constant_type.php:24: Parameter #1 $value of function Conformance\Tests\ConstantsClassConstantType\takesString expects string, int given. [identifier=argument.type] [reported-from-level=5]
With strict-rules
constants_class_constant_type.php:24: Parameter #1 $value of function Conformance\Tests\ConstantsClassConstantType\takesString expects string, int given. [identifier=argument.type]
psalm 6.16.1Psalm 6.16.1@f1f5de594dc76faf8784e02d3dc4716c91c6f6ac
next: 7.0.0-beta19
Pass
constants_class_constant_type.php:24: Argument 1 of Conformance\Tests\ConstantsClassConstantType\takesString expects string, but 200 provided [InvalidScalarArgument]
mago 1.46.0mago 1.46.0 Pass
constants_class_constant_type.php:24: Invalid argument type for argument #1 of `Conformance\Tests\ConstantsClassConstantType\takesString`: expected `string`, but found `int(200)`. [invalid-argument]
mir 0.70.1mir 0.70.1 Pass
constants_class_constant_type.php:24: InvalidArgument: Argument $value of takesString() expects 'string', got '200' [MIR0201]
phpantom 0.9.0phpantom_lsp 0.9.0 Pass
constants_class_constant_type.php:24: Argument 1 ($value) expects string, got int [type_mismatch_argument]
intelephense 1.18.5intelephense 1.18.5 Pass
constants_class_constant_type.php:24: Expected type 'string'. Found 'int'. [P1006]
phpy 0.2.0phpy 0.2.0 Pass
constants_class_constant_type.php:24: Argument '1' passed to Conformance\Tests\ConstantsClassConstantType\takesString() is expected to be of type string, int given
qodana 262.8665.325Qodana 262.8665.325 Pass
constants_class_constant_type.php:24: Parameter 'HttpStatus::OK' type is not compatible with declaration when using strict type matching [PhpParamsInspection]
constants_class_constant_type.php:24: Parameter 'HttpStatus::OK' 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 24: Expected 1 error(s)
steins 0.1.5steins 0.1.5 (2026-08-12 revision 39b4cc1) Pass
constants_class_constant_type.php:24: argument 200 to takesString() cannot become string $value — proven TypeError (strict mode) [type.argument-mismatch]
phpstan-strict 2.2.8PHPStan - PHP Static Analysis Tool 2.2.8 Pass
constants_class_constant_type.php:24: Parameter #1 $value of function Conformance\Tests\ConstantsClassConstantType\takesString expects string, int given. [identifier=argument.type]
psalm-next 7.0.0-beta19Psalm 7.0.0-beta19@7e751c06a756fa64dc4c759c09fe4a173afcb433 Pass
constants_class_constant_type.php:24: Argument 1 of Conformance\Tests\ConstantsClassConstantType\takesString expects string, but 200 provided [InvalidScalarArgument]

Source

<?php

declare(strict_types=1);

namespace Conformance\Tests\ConstantsClassConstantType;

/**
 * Basic class constant value compatibility checks.
 *
 * References:
 * - PHP class constants
 */

final class HttpStatus
{
    public const int OK = 200;
}

function takesString(string $value): void
{
}

takesString('ok');
takesString(HttpStatus::OK); // E: int constant is not accepted where string is required