non-empty-lowercase-stringstrtolower(). The halves fail independently, so '' is rejected only by the
length half and 'ABC' only by the case half — an analyzer can model one and
miss the other. Analyzers that model neither fall back to plain string and
accept both.
References:
- PHPStan TypeNodeResolver non-empty-lowercase-string resolves to string&AccessoryNonEmptyStringType&AccessoryLowercaseStringType| 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 | Partly enforced (1/2) | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Argument 1 ($value) is '' of type string but \Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString() takes non-empty-string (no real type) defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/phpdoc_advanced_fallback_non_empty_lowercase_string.php:35 (the inferred real argument type has nothing in common with the parameter's phpdoc type) [PhanTypeMismatchArgumentProbablyReal]
|
| phpstan | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Enforced reported Lv.5+ | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Parameter #1 $value of function Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects lowercase-string&non-empty-string, '' given. [reported-from-level=5] phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Parameter #1 $value of function Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects lowercase-string&non-empty-string, 'ABC' given. [reported-from-level=5] With strict-rulesphpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Parameter #1 $value of function Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects lowercase-string&non-empty-string, '' given. phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Parameter #1 $value of function Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects lowercase-string&non-empty-string, 'ABC' given.
|
| psalm | 6.20.0Psalm 6.20.0@804f03c0c183d149fcd4b8c7c0c9b3fbf836d34c next: 7.0.0-rc2 |
Enforced | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Argument 1 of Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects non-empty-lowercase-string, but '' provided [InvalidArgument] phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Argument 1 of Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects non-empty-lowercase-string, but 'ABC' provided [InvalidArgument]
|
| mago | 1.57.0mago 1.57.0 | Enforced | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Invalid argument type for argument #1 of `Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString`: expected `lowercase-non-empty-string`, but found `string('')`. [invalid-argument]
phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Invalid argument type for argument #1 of `Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString`: expected `lowercase-non-empty-string`, but found `string('ABC')`. [invalid-argument]
|
| mir | 0.87.0mir 0.87.0 | Widened to string | No diagnostics reported.
|
| phpantom | 0.11.1phpantom_lsp 0.11.1 | Enforced | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Argument 1 ($value) expects non-empty-lowercase-string, got '' [type_mismatch_argument] phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Argument 1 ($value) expects non-empty-lowercase-string, got 'ABC' [type_mismatch_argument]
|
| intelephense | 1.18.5intelephense 1.18.5 | Widened to string | 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 | Widened to string | No diagnostics reported.
Notes: Checked as plain `string`: a wrong type is reported as "Expected parameter of type 'string'", and `''` and `'ABC'` pass, exactly as for `@param string`. Quick Documentation still shows `non-empty-lowercase-string`, so the spelling is recognised and only the refinement is dropped. |
| 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_fallback_non_empty_lowercase_string.php:47: argument "" to acceptsNonEmptyLowercaseString() violates declared @param non-empty-lowercase-string $value — declared contract violation [phpdoc.param-mismatch] phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: argument "ABC" to acceptsNonEmptyLowercaseString() violates declared @param non-empty-lowercase-string $value — declared contract violation [phpdoc.param-mismatch]
|
| phpstan-strict | 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 | Enforced | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Parameter #1 $value of function Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects lowercase-string&non-empty-string, '' given. phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Parameter #1 $value of function Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects lowercase-string&non-empty-string, 'ABC' given.
|
| psalm-next | 7.0.0-rc2Psalm 7.0.0-rc2@20339e3fe5b8d03bcd8061030eb2a83ad50e5783 | Enforced | phpdoc_advanced_fallback_non_empty_lowercase_string.php:47: Argument 1 of Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects non-empty-lowercase-string, but '' provided [InvalidArgument] phpdoc_advanced_fallback_non_empty_lowercase_string.php:50: Argument 1 of Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString\acceptsNonEmptyLowercaseString expects non-empty-lowercase-string, but 'ABC' provided [InvalidArgument]
|
<?php
declare(strict_types=1);
namespace Conformance\Tests\PhpdocAdvancedFallbackNonEmptyLowercaseString;
/**
* `non-empty-lowercase-string`
*
* The intersection of two refinements: at least one character, and unchanged by
* `strtolower()`. The halves fail independently, so `''` is rejected only by the
* length half and `'ABC'` only by the case half — an analyzer can model one and
* miss the other. Analyzers that model neither fall back to plain `string` and
* accept both.
*
* References:
* - PHPStan TypeNodeResolver `non-empty-lowercase-string` resolves to string&AccessoryNonEmptyStringType&AccessoryLowercaseStringType
*/
/**
* @return non-empty-lowercase-string
*/
function returnsNonEmptyLowercaseString() // T: non-empty-lowercase-string
{
return 'abc'; // V
}
function acceptsString(string $value): void
{
}
/**
* @param non-empty-lowercase-string $value
*/
function acceptsNonEmptyLowercaseString($value): void // T: non-empty-lowercase-string
{
}
// A `non-empty-lowercase-string` value always satisfies a native `string` parameter.
acceptsString(returnsNonEmptyLowercaseString()); // V
// A non-empty string with nothing uppercase in it satisfies both halves.
acceptsNonEmptyLowercaseString('abc'); // V
acceptsNonEmptyLowercaseString('123'); // V
// Lowercase, but empty.
acceptsNonEmptyLowercaseString(''); // E?: '' is not a non-empty-lowercase-string
// Non-empty, but not lowercase.
acceptsNonEmptyLowercaseString('ABC'); // E?: 'ABC' is not a non-empty-lowercase-string