@phan-debug-varPhanDebugAnnotation with the
inferred union type. Other tools usually see a no-op string statement and
may report "expression has no effect" / "does not do anything" — that is
style noise, not feature enforcement, so it is marked // E?[noise].
Phan attributes the diagnostic to the enclosing statement line (if), not
to the string line itself. The enforcement probe therefore sits on the if.
References:
- Phan Annotating-Your-Source-Code-V6.md: @phan-debug-var| 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 | Enforced | debug_phan_debug_var.php:27: @phan-debug-var requested for variable $value - it has union type int(real=int) [PhanDebugAnnotation]
|
| phpstan | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Not enforced reported Lv.4+ | debug_phan_debug_var.php:29: Expression "'@phan-debug-var $value'" on a separate line does not do anything. [reported-from-level=4] With strict-rulesdebug_phan_debug_var.php:29: Expression "'@phan-debug-var $value'" on a separate line does not do anything.
|
| psalm | 6.20.0Psalm 6.20.0@804f03c0c183d149fcd4b8c7c0c9b3fbf836d34c next: 7.0.0-rc2 |
Not enforced | No diagnostics reported.
|
| mago | 1.57.0mago 1.57.0 | Not enforced | debug_phan_debug_var.php:29: Expression has no effect as a statement [unused-statement]
|
| mir | 0.87.0mir 0.87.0 | Not enforced | No diagnostics reported.
|
| 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 | debug_phan_debug_var.php:29: Expression evaluated but not used [discardExpr]
|
| 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 | Not enforced | debug_phan_debug_var.php:29: Expression "'@phan-debug-var $value'" on a separate line does not do anything.
|
| psalm-next | 7.0.0-rc2Psalm 7.0.0-rc2@20339e3fe5b8d03bcd8061030eb2a83ad50e5783 | Not enforced | No diagnostics reported.
|
<?php
declare(strict_types=1);
namespace Conformance\Tests\DebugPhanDebugVar;
/**
* Cross-tool handling of `@phan-debug-var`.
*
* Phan requires a *string expression statement* (not a comment) so the AST
* exposes the annotation. Honouring it means a `PhanDebugAnnotation` with the
* inferred union type. Other tools usually see a no-op string statement and
* may report "expression has no effect" / "does not do anything" — that is
* style noise, not feature enforcement, so it is marked `// E?[noise]`.
*
* Phan attributes the diagnostic to the enclosing statement line (`if`), not
* to the string line itself. The enforcement probe therefore sits on the `if`.
*
* References:
* - Phan Annotating-Your-Source-Code-V6.md: `@phan-debug-var`
*
* @conformance-kind debug
*/
function example(int|string $value): void // T: @phan-debug-var
{
if (\is_int($value)) { // E?: PhanDebugAnnotation is attributed here (enclosing statement)
// Must be a bare string statement — php-ast does not surface comments.
'@phan-debug-var $value'; // E?[noise]: non-Phan "no effect" / unused-statement noise — not enforcement
}
}