@phpstan-pureecho that contradicts the claim. That makes it the one
prefixed tag whose probe is inside the annotated declaration.
References:
- PHPStan phpdocs-basics: @phpstan-pure / @phpstan-impure
- Psalm supported_annotations.md: @psalm-pure| 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.2+ | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: Impure echo in pure function Conformance\Tests\PhpdocAdvancedVendorPrefixedPurePhpStan\claimsPure(). [reported-from-level=2] With strict-rulesphpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: Impure echo in pure function Conformance\Tests\PhpdocAdvancedVendorPrefixedPurePhpStan\claimsPure().
|
| psalm | 6.20.0Psalm 6.20.0@804f03c0c183d149fcd4b8c7c0c9b3fbf836d34c next: 7.0.0-rc2 |
Enforced | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: Cannot call echo from a mutation-free context [ImpureFunctionCall]
|
| mago | 1.57.0mago 1.57.0 | Enforced | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: Impure use of `echo` in a pure context. [impure-construct]
|
| mir | 0.87.0mir 0.87.0 | Enforced | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: ImpureFunctionCall: Calling impure function echo() in a @pure function [MIR1704]
|
| phpantom | 0.11.1phpantom_lsp 0.11.1 | Not enforced | No diagnostics reported.
|
| intelephense | 1.18.5intelephense 1.18.5 | Not enforced | No diagnostics reported.
|
| 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 | No diagnostics reported.
|
| steins | 0.1.8steins 0.1.8 (2026-09-21 revision 76306a9) | Enforced | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: echo has effect io.output.buffer, but claimsPure() is declared @phpstan-pure [effect.envelope-exceeded]
|
| phpstan-strict | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Enforced | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: Impure echo in pure function Conformance\Tests\PhpdocAdvancedVendorPrefixedPurePhpStan\claimsPure().
|
| psalm-next | 7.0.0-rc2Psalm 7.0.0-rc2@20339e3fe5b8d03bcd8061030eb2a83ad50e5783 | Enforced | phpdoc_advanced_vendor_prefixed_pure_phpstan.php:26: The context is pure but echo requires io [ImpureFunctionCall]
|
<?php
declare(strict_types=1);
namespace Conformance\Tests\PhpdocAdvancedVendorPrefixedPurePhpStan;
/**
* Cross-tool handling of `@phpstan-pure`
*
* The tag claims a function has no side effects, and unlike the other tags here
* it is checked against the *body* rather than used at a call site: honouring it
* means reporting the `echo` that contradicts the claim. That makes it the one
* prefixed tag whose probe is inside the annotated declaration.
*
* References:
* - PHPStan phpdocs-basics: @phpstan-pure / @phpstan-impure
* - Psalm supported_annotations.md: @psalm-pure
*/
/**
* @phpstan-pure
*/
function claimsPure(int $value): int // T: @phpstan-pure
{
// The claim and the body disagree: honouring the tag means saying so.
echo 'side effect'; // E?: an echo contradicts @phpstan-pure
return $value + 1; // V
}
echo claimsPure(1);