{"record":{"id":"c330be381d42bc09","repo":"Intervention/image","slug":"failed-to-apply-class-unable-to-mirror-image","errorCode":null,"errorMessage":"Failed to apply {class}, unable to mirror image","messagePattern":"Failed to apply (.+?), unable to mirror image","errorType":"exception","errorClass":"Intervention\\Image\\Exceptions\\ModifierException","httpStatus":null,"severity":"error","filePath":"src/Drivers/Imagick/Modifiers/FlipModifier.php","lineNumber":27,"sourceCode":"use Intervention\\Image\\Exceptions\\ModifierException;\nuse Intervention\\Image\\Interfaces\\ImageInterface;\nuse Intervention\\Image\\Interfaces\\SpecializedInterface;\nuse Intervention\\Image\\Modifiers\\FlipModifier as GenericFlipModifier;\n\nclass FlipModifier extends GenericFlipModifier implements SpecializedInterface\n{\n    /**\n     * @throws ModifierException\n     */\n    public function apply(ImageInterface $image): ImageInterface\n    {\n        foreach ($image as $frame) {\n            try {\n                $result = $this->direction === Direction::HORIZONTAL\n                    ? $frame->native()->flopImage()\n                    : $frame->native()->flipImage();\n                if ($result === false) {\n                    throw new ModifierException(\n                        'Failed to apply ' . self::class . ', unable to mirror image',\n                    );\n                }\n            } catch (ImagickException $e) {\n                throw new ModifierException(\n                    'Failed to apply ' . self::class . ', unable to mirror image',\n                    previous: $e,\n                );\n            }\n        }\n\n        return $image;\n    }\n}\n","sourceCodeStart":9,"sourceCodeEnd":42,"githubUrl":"https://github.com/Intervention/image/blob/5598b9e39751c34afc5cdee84abef77f92c26f68/src/Drivers/Imagick/Modifiers/FlipModifier.php#L9-L42","documentation":"This ModifierException is thrown by $image->flip() / $image->flop() when the native mirror operation reports failure by returning false. The Imagick driver calls flopImage() for Direction::HORIZONTAL and flipImage() for vertical mirroring; a false return means ImageMagick could not mirror the frame, and the driver converts that to 'unable to mirror image' with no chained previous exception.","triggerScenarios":"Calling $image->flip('vertical') or $image->flip('horizontal') on very large images whose pixel cache exceeds ImageMagick's memory/area limits; mirroring frames with corrupted or locked pixel caches; ImageMagick builds where the mirror primitive is unavailable or policy-restricted.","commonSituations":"Flipping high-resolution photos on memory-constrained shared hosting; processing corrupted uploads that decode but have inconsistent pixel caches; restrictive policy.xml configurations; rare builds of ImageMagick with missing core delegates.","solutions":["Retry the operation on a downscaled copy to confirm a resource-limit cause","Check ImageMagick limits (`magick -list resource`) and raise memory/area caps in policy.xml","Increase PHP memory_limit if the native op dies during cache allocation","Re-encode suspicious sources to a clean format before processing","Update the imagick extension and ImageMagick; a false return with no exception usually indicates environment limits"],"exampleFix":"// before\n$image->flip('horizontal'); // false return on 100MP scan\n\n// after\nif ($image->width() * $image->height() > 50_000_000) {\n    $image->scaleDown(width: 8000);\n}\n$image->flip('horizontal');","handlingStrategy":"try-catch","validationCode":"$pixelCount = $image->width() * $image->height();\nif ($pixelCount > 50_000_000) {\n    $image->scaleDown(width: 8000);\n}\n$image->flip('horizontal');","typeGuard":null,"tryCatchPattern":"use Intervention\\Image\\Exceptions\\ModifierException;\n\ntry {\n    $image->flip('horizontal');\n} catch (ModifierException $e) {\n    Log::warning('Mirror failed: ' . optional($e->getPrevious())->getMessage());\n    throw $e;\n}","preventionTips":["Downscale very large images before mirroring on constrained hosts","Check `magick -list resource` and policy.xml when flips start failing at scale","Re-encode sources from untrusted origins before processing","A false return with no previous exception almost always points to resource limits, not your code"],"tags":["intervention-image","imagick","flip","mirror","resource-limits","php"],"backgroundTag":"imagick-flip-flop-failed","analyzedSha":"5598b9e39751c34afc5cdee84abef77f92c26f68","analyzedAt":"2026-08-23T02:17:31.068Z","schemaVersion":2},"datasetVersion":"2026-08-23T08:06:27.607Z"}