{"record":{"id":"5ea8a55163bcfe41","repo":"Intervention/image","slug":"failed-to-convert-colorspace-to-imagick-constant","errorCode":null,"errorMessage":"Failed to convert colorspace to Imagick constant","messagePattern":"Failed to convert colorspace to Imagick constant","errorType":"exception","errorClass":"ModifierException","httpStatus":null,"severity":"error","filePath":"src/Drivers/Imagick/Modifiers/ColorspaceModifier.php","lineNumber":85,"sourceCode":"\n        if ($colorspace instanceof Hsl) {\n            return Imagick::COLORSPACE_HSL;\n        }\n\n        if ($colorspace instanceof Hsv) {\n            return Imagick::COLORSPACE_HSB;\n        }\n\n        try {\n            if ($colorspace instanceof Oklab && defined(Imagick::class . '::COLORSPACE_OKLAB')) {\n                return constant(Imagick::class . '::COLORSPACE_OKLAB');\n            }\n\n            if ($colorspace instanceof Oklch && defined(Imagick::class . '::COLORSPACE_OKLCH')) {\n                return constant(Imagick::class . '::COLORSPACE_OKLCH');\n            }\n        } catch (Error $e) {\n            throw new ModifierException(\n                'Failed to convert colorspace to Imagick constant',\n                previous: $e,\n            );\n        }\n\n        throw new NotSupportedException('Colorspace ' . $colorspace::class . ' is not supported by driver');\n    }\n}\n","sourceCodeStart":67,"sourceCodeEnd":94,"githubUrl":"https://github.com/Intervention/image/blob/5598b9e39751c34afc5cdee84abef77f92c26f68/src/Drivers/Imagick/Modifiers/ColorspaceModifier.php#L67-L94","documentation":"Thrown inside ColorspaceModifier::imagickColorspaceOrFail() when resolving the Oklab/Oklch Imagick constants raises a PHP Error (e.g. from constant() or a class-resolution failure inside the try). It is a narrow diagnostic wrapper: the defined() checks normally prevent undefined-constant access, so reaching the catch means an unexpected engine-level Error occurred while fetching the constant.","triggerScenarios":"Selecting Oklab or Oklch as target colorspace on a build where COLORSPACE_OKLAB/COLORSPACE_OKLCH is reported as defined but constant() retrieval fails (broken extension state), or where an autoload/Error condition fires inside the try block. Rare in practice; most unsupported builds fall through to NotSupportedException instead.","commonSituations":"Bleeding-edge ImageMagick/imagick combinations with partially exposed Oklab constants; exotic runtimes where class constants behave inconsistently; usually encountered while diagnosing Oklab/Oklch support differences across environments.","solutions":["Inspect $e->getPrevious() — it holds the actual PHP Error explaining the retrieval failure.","Update ext-imagick and ImageMagick to a coherent recent pair where Oklab/Oklch constants are fully exposed (ImageMagick 7.1+/recent pecl/imagick).","If the environment cannot reliably expose the constant, target a well-supported colorspace (sRGB) instead.","Verify manually: php -r 'var_dump(defined(\"\\\\Imagick::COLORSPACE_OKLAB\"));' before relying on Oklab in that environment."],"exampleFix":"// before\n$image->colorspace(\\Intervention\\Image\\Colors\\Oklab\\Colorspace::class); // Error caught -> ModifierException\n\n// after\nif (defined(\\Imagick::class . '::COLORSPACE_OKLAB')) {\n    $image->colorspace(\\Intervention\\Image\\Colors\\Oklab\\Colorspace::class);\n} else {\n    $image->colorspace(\\Intervention\\Image\\Colors\\Rgb\\Colorspace::class);\n}","handlingStrategy":"validation","validationCode":"if (!defined(\\Imagick::class . '::COLORSPACE_OKLAB')) {\n    // do not attempt Oklab on this build\n    $target = \\Intervention\\Image\\Colors\\Rgb\\Colorspace::class;\n}","typeGuard":"function imagickSupports(string $constant): bool\n{\n    return defined(\\Imagick::class . '::' . $constant);\n}","tryCatchPattern":"use Intervention\\Image\\Exceptions\\ModifierException;\ntry {\n    $image->colorspace(\\Intervention\\Image\\Colors\\Oklab\\Colorspace::class);\n} catch (ModifierException $e) {\n    // Error-derived previous: usually a broken extension — fall back to sRGB\n    $image->colorspace(\\Intervention\\Image\\Colors\\Rgb\\Colorspace::class);\n}","preventionTips":["Feature-detect Oklab/Oklch constants per environment instead of assuming them.","Run a deployment smoke test over the exotic colorspaces you use."],"tags":["imagick","oklab","oklch","colourspace","php-error","constant-resolution"],"backgroundTag":"colorspace-conversion-failed","analyzedSha":"5598b9e39751c34afc5cdee84abef77f92c26f68","analyzedAt":"2026-08-23T02:17:31.068Z","schemaVersion":2},"datasetVersion":"2026-08-23T08:06:27.607Z"}