@phan-assert@psalm-assert /
@phpstan-assert. After the call, supporting tools treat the argument as
the asserted type.
References:
- Phan Annotating-Your-Source-Code-V6.md: @phan-assert
- Psalm adding_assertions.md / PHPStan narrowing-types.md| 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 | Not enforced | No diagnostics reported.
|
| phpstan | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Enforced reported Lv.4+ | phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Call to function is_string() with int will always evaluate to false. [reported-from-level=4] With strict-rulesphpdoc_advanced_vendor_prefixed_assert_phan.php:43: Call to function is_string() with int will always evaluate to false.
|
| psalm | 6.20.0Psalm 6.20.0@804f03c0c183d149fcd4b8c7c0c9b3fbf836d34c next: 7.0.0-rc2 |
Enforced (pzoom≠) | phpdoc_advanced_vendor_prefixed_assert_phan.php:37: Argument 1 of Conformance\Tests\PhpdocAdvancedVendorPrefixedAssertPhan\takesInt cannot be mixed, expecting int [MixedArgument] phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Type int for $value is never string [TypeDoesNotContainType] phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Type int for $value is never string [RedundantCondition] pzoom (Psalm port)phpdoc_advanced_vendor_prefixed_assert_phan.php:37: Argument 1 of takesInt cannot be mixed, expecting int [MixedArgument]
Expectation diffLine 37: Expected valid value to be accepted, got ["Argument 1 of Conformance\\Tests\\PhpdocAdvancedVendorPrefixedAssertPhan\\takesInt cannot be mixed, expecting int [MixedArgument]"] |
| mago | 1.57.0mago 1.57.0 | Enforced | phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Impossible type assertion: `$value` of type `int` can never be `string`. [impossible-type-comparison] phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Redundant ternary operator: condition is always falsy. [impossible-condition]
|
| mir | 0.87.0mir 0.87.0 | Not enforced | phpdoc_advanced_vendor_prefixed_assert_phan.php:37: MixedArgument: Argument $value of takesInt() is mixed [MIR1200]
Expectation diffLine 37: Expected valid value to be accepted, got ["MixedArgument: Argument $value of takesInt() is mixed [MIR1200]"] |
| phpantom | 0.11.1phpantom_lsp 0.11.1 | Not enforced | No diagnostics reported.
|
| intelephense | 1.18.5intelephense 1.18.5 | Incidental (0/1) | phpdoc_advanced_vendor_prefixed_assert_phan.php:37: Expected type 'int'. Found 'mixed'. [P1006]
Expectation diffLine 37: Expected valid value to be accepted, got ["Expected type 'int'. Found 'mixed'. [P1006]"] |
| phpactor | 2026.10.07.0Phpactor 2026.10.07.0 | Not enforced | No diagnostics reported.
|
| phpy | 1.0.19409phpy 1.0.19409 | Not enforced | No diagnostics reported.
|
| qodana | 262.10968.76PhpStorm 262.10968.76 | Not enforced | 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 | Not enforced | phpdoc_advanced_vendor_prefixed_assert_phan.php:37: not null safety call in function Conformance\Tests\PhpdocAdvancedVendorPrefixedAssertPhan\takesInt signature of param value [notNullSafetyFunctionArgumentVariable]
Expectation diffLine 37: Expected valid value to be accepted, got ["not null safety call in function Conformance\\Tests\\PhpdocAdvancedVendorPrefixedAssertPhan\\takesInt signature of param value [notNullSafetyFunctionArgumentVariable]"] |
| steins | 0.1.8steins 0.1.8 (2026-09-21 revision 76306a9) | Not enforced | No diagnostics reported.
|
| phpstan-strict | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Enforced | phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Call to function is_string() with int will always evaluate to false.
|
| psalm-next | 7.0.0-rc2Psalm 7.0.0-rc2@20339e3fe5b8d03bcd8061030eb2a83ad50e5783 | Enforced | phpdoc_advanced_vendor_prefixed_assert_phan.php:37: Argument 1 of Conformance\Tests\PhpdocAdvancedVendorPrefixedAssertPhan\takesInt cannot be mixed, expecting int [MixedArgument] phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Type int for $value is never string [TypeDoesNotContainType] phpdoc_advanced_vendor_prefixed_assert_phan.php:43: Type int for $value is never string [RedundantCondition]
Expectation diffLine 37: Expected valid value to be accepted, got ["Argument 1 of Conformance\\Tests\\PhpdocAdvancedVendorPrefixedAssertPhan\\takesInt cannot be mixed, expecting int [MixedArgument]"] |
<?php
declare(strict_types=1);
namespace Conformance\Tests\PhpdocAdvancedVendorPrefixedAssertPhan;
/**
* Cross-tool handling of `@phan-assert`.
*
* Phan's unconditional assertion tag, parallel to `@psalm-assert` /
* `@phpstan-assert`. After the call, supporting tools treat the argument as
* the asserted type.
*
* References:
* - Phan Annotating-Your-Source-Code-V6.md: `@phan-assert`
* - Psalm adding_assertions.md / PHPStan narrowing-types.md
*/
/**
* @phan-assert int $value
*/
function assertIsInt(mixed $value): void // T: @phan-assert
{
if (!\is_int($value)) {
throw new \InvalidArgumentException('not an int');
}
}
function takesInt(int $value): void
{
}
function example(mixed $value): void
{
assertIsInt($value);
takesInt($value); // V
// Applying the assertion makes $value an int, so an is_string() branch is
// provably dead. A tool that ignores the tag keeps `mixed`, where
// is_string() is a live check and nothing is reported — so the diagnostic
// is emitted only by a tool that actually honoured @phan-assert.
echo \is_string($value) ? 'string' : 'int'; // E?: after @phan-assert int, is_string() is always false
}