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@phan-read-only and @phan-write-only

Group: Advanced PHPDoc types · Category: ecosystem · File: phpdoc_advanced_phan_read_only_write_only.php

Phan-specific property access polarity: read-only forbids external writes; write-only forbids reads. References: - Phan Annotating-Your-Source-Code: @phan-read-only and @phan-write-only

Analyzer results

AnalyzerVersionResultDiagnostics
phan 6.0.10Phan 6.0.10 php-ast version 1.1.3 PHP version used to run Phan: 8.5.11 Enforced 
phpdoc_advanced_phan_read_only_write_only.php:28: Cannot modify read-only property \Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly\Bag->id defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/phpdoc_advanced_phan_read_only_write_only.php:20 [PhanAccessReadOnlyProperty]
phpdoc_advanced_phan_read_only_write_only.php:31: Cannot read write-only property \Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly\Bag->scratch defined at /Users/megurine/repo/php/php-typing-conformance/conformance/tests/phpdoc_advanced_phan_read_only_write_only.php:23 [PhanAccessWriteOnlyProperty]
  • Recognition: spelling resolved
  • Enforcement: 2/2 of the expected violations reported
phpstan 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 Unrecognized 
phpdoc_advanced_phan_read_only_write_only.php:20: @readonly property cannot have a default value. [reported-from-level=0]
phpdoc_advanced_phan_read_only_write_only.php:28: @readonly property Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly\Bag::$id is assigned outside of its declaring class. [reported-from-level=3]
With strict-rules
phpdoc_advanced_phan_read_only_write_only.php:20: @readonly property cannot have a default value.
phpdoc_advanced_phan_read_only_write_only.php:28: @readonly property Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly\Bag::$id is assigned outside of its declaring class.
  • Recognition: spelling not resolved — reported on declaration line(s) 20
  • Enforcement: 1/2 of the expected violations reported — incidental, since the spelling was not resolved
psalm 6.20.0Psalm 6.20.0@804f03c0c183d149fcd4b8c7c0c9b3fbf836d34c
next: 7.0.0-rc2		 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
mago 1.57.0mago 1.57.0 Partly enforced (1/2) 
phpdoc_advanced_phan_read_only_write_only.php:28: Cannot initialize readonly property `Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly\Bag::$id` from the global scope. [invalid-property-write]
  • Recognition: spelling resolved
  • Enforcement: 1/2 of the expected violations reported
mir 0.87.0mir 0.87.0 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
phpantom 0.11.1phpantom_lsp 0.11.1 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
intelephense 1.18.5intelephense 1.18.5 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
phpactor 2026.10.07.0Phpactor 2026.10.07.0 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
phpy 1.0.19409phpy 1.0.19409 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
qodana 262.10968.76PhpStorm 262.10968.76 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations 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.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
steins 0.1.8steins 0.1.8 (2026-09-21 revision 76306a9) Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported
phpstan-strict 2.3.1PHPStan - PHP Static Analysis Tool 2.3.1 Unrecognized 
phpdoc_advanced_phan_read_only_write_only.php:20: @readonly property cannot have a default value.
phpdoc_advanced_phan_read_only_write_only.php:28: @readonly property Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly\Bag::$id is assigned outside of its declaring class.
  • Recognition: spelling not resolved — reported on declaration line(s) 20
  • Enforcement: 1/2 of the expected violations reported — incidental, since the spelling was not resolved
psalm-next 7.0.0-rc2Psalm 7.0.0-rc2@20339e3fe5b8d03bcd8061030eb2a83ad50e5783 Not enforced

No diagnostics reported.

  • Recognition: spelling resolved
  • Enforcement: 0/2 of the expected violations reported

Source

<?php

declare(strict_types=1);

namespace Conformance\Tests\PhpdocAdvancedPhanReadOnlyWriteOnly;

/**
 * Cross-tool handling of `@phan-read-only` and `@phan-write-only`.
 *
 * Phan-specific property access polarity: read-only forbids external writes;
 * write-only forbids reads.
 *
 * References:
 * - Phan Annotating-Your-Source-Code: `@phan-read-only` and `@phan-write-only`
 */

final class Bag
{
    /** @phan-read-only */
    public int $id = 1; // T: @phan-read-only

    /** @phan-write-only */
    public int $scratch = 0; // T: @phan-write-only
}

$bag = new Bag();
echo $bag->id; // V
$bag->id = 2; // E?: @phan-read-only property written

$bag->scratch = 3; // V
echo $bag->scratch; // E?: @phan-write-only property read