PHPackages rcsofttech/php-image-guard - PHPackages - PHPackages [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register) 1. [Directory](/) 2. / 3. [Image & Media](/categories/media) 4. / 5. rcsofttech/php-image-guard ActiveLibrary[Image & Media](/categories/media) rcsofttech/php-image-guard ========================== SSIM-based image quality verification with auto-retry compression loop for PHP 8.4+ v1.0.0(3mo ago)81↓90.9%MITPHPPHP ^8.4CI passing Since Mar 31Pushed 3mo agoCompare [ Source](https://github.com/rcsofttech85/php-image-guard)[ Packagist](https://packagist.org/packages/rcsofttech/php-image-guard)[ RSS](/packages/rcsofttech-php-image-guard/feed)WikiDiscussions main Synced 4w ago READMEChangelogDependencies (3)Versions (2)Used By (0) php-image-guard =============== [](#php-image-guard) [![PHP 8.4](https://camo.githubusercontent.com/d99323f769f72040b693c48a2dfaa9b767bae7f8dc307ac17c678e033fe4bdd8/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5048502d382e342b2d626c75652e737667)](https://php.net)[![License: MIT](https://camo.githubusercontent.com/fdf2982b9f5d7489dcf44570e714e3a15fce6253e0cc6b5aa61a075aac2ff71b/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f4c6963656e73652d4d49542d79656c6c6f772e737667)](LICENSE)[![PHPStan: Max](https://camo.githubusercontent.com/745eb989b9e4903dc598fe2cc63ed4226198be55b7c729001cbd1ece7676fef6/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5048505374616e2d6d61782d627269676874677265656e2e737667)](phpstan.neon)[![Codacy Badge](https://camo.githubusercontent.com/a0221ab10cfef288ee4dca23e9ab761935218b92eb59c99e6ae153829816e38d/68747470733a2f2f6170702e636f646163792e636f6d2f70726f6a6563742f62616467652f47726164652f3534623033323931396539363435303161346436383166353631343235613632)](https://app.codacy.com/gh/rcsofttech85/php-image-guard/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)[![Codacy Badge](https://camo.githubusercontent.com/c8f260c257262f68db52608075fa3c94ad3a539f347b905a6cc00536fef7b1e5/68747470733a2f2f6170702e636f646163792e636f6d2f70726f6a6563742f62616467652f436f7665726167652f3534623033323931396539363435303161346436383166353631343235613632)](https://app.codacy.com/gh/rcsofttech85/php-image-guard/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_coverage) > SSIM-based image quality verification with auto-retry compression loop for PHP 8.4+ This package does **ONE job**: guard image quality. It does not compress, resize, or upload images. It verifies that a compression result meets your quality threshold — and retries if not. --- Requirements ------------ [](#requirements) - PHP 8.4+ - `ext-gd` (required) - `ext-imagick` (optional — enables higher-precision SSIM via float pixel data) --- Installation ------------ [](#installation) ``` composer require rcsofttech/php-image-guard ``` Quick Start ----------- [](#quick-start) ### Minimal — check one image [](#minimal--check-one-image) ``` use RcSoftTech\ImageGuard\ImageGuard; $gdImage = imagecreatefromjpeg('original.jpg'); $result = ImageGuard::check( 'original.jpg', function (int $quality, string $originalPath) use ($gdImage): string { $out = "/tmp/compressed_q{$quality}.jpg"; imagejpeg($gdImage, $out, $quality); return $out; } ); echo $result->summary(); // "Passed (SSIM: 0.961, Quality: 75, Saved: 68%, 143ms)" ``` ### Standalone SSIM score (no retry) [](#standalone-ssim-score-no-retry) ``` $score = ImageGuard::compare('original.jpg', 'compressed.jpg'); // float e.g. 0.961423 ``` --- Full Fluent API --------------- [](#full-fluent-api) ``` use RcSoftTech\ImageGuard\Enums\OnFailBehavior; use RcSoftTech\ImageGuard\ImageGuard; $result = ImageGuard::original('original.jpg') ->compressWith($compressor) ->threshold(0.92) // or: 'strict' | 'balanced' | 'loose' ->startAt(75) // initial quality integer ->maxQuality(95) // ceiling for retry loop ->step(5) // quality bump per retry ->onFail(OnFailBehavior::RECOMPRESS) ->run(ImageGuard::resolveCalculator()); if ($result->failed()) { logger()->warning('Image below threshold', $result->toArray()); } ``` ### Quality Presets [](#quality-presets) StringSSIM Threshold`'strict'`0.97`'balanced'`0.92`'loose'`0.85Custom numeric thresholds are typically used in the `0.0` to `1.0` range. ### Failure Behaviors [](#failure-behaviors) `OnFailBehavior`Action`RECOMPRESS`Retry up to `maxQuality`, then accept best result`WARN`Return `passed=false` + add `$result->warnings``ABORT`Throw exception holding the full `PipelineResult`--- Batch API --------- [](#batch-api) ``` $report = ImageGuard::batch(glob('uploads/*.jpg')) ->compressWith($compressor) ->threshold('balanced') ->onFail(OnFailBehavior::WARN) ->run(ImageGuard::resolveCalculator()); echo $report->totalSaved(); // "38.1 MB saved across 147 images" echo $report->failRate(); // "3 of 147 failed (2.0%)" echo $report->averageSsim(); // 0.941200 file_put_contents('audit.json', $report->toJson()); file_put_contents('audit.csv', $report->toCsv()); ``` --- Compressor Examples ------------------- [](#compressor-examples) The compressor callable receives a `quality` integer and the `originalPath`string, and **must return the path to the compressed file**. This decouples `php-image-guard` from any specific tool. ### Plain GD [](#plain-gd) ``` $compressor = function (int $quality, string $originalPath) use ($tmpDir): string { $gdImage = imagecreatefromjpeg($originalPath); $output = "{$tmpDir}/compressed_q{$quality}.jpg"; imagejpeg($gdImage, $output, $quality); imagedestroy($gdImage); return $output; }; ``` ### With `spatie/image-optimizer` [](#with-spatieimage-optimizer) ``` use Spatie\ImageOptimizer\OptimizerChain; use Spatie\ImageOptimizer\Optimizers\Jpegoptim; $compressor = function (int $quality, string $originalPath) use ($tmpDir): string { $output = "{$tmpDir}/compressed_q{$quality}.jpg"; copy($originalPath, $output); (new OptimizerChain)->addOptimizer( new Jpegoptim(['--max=' . $quality]) )->optimize($output); return $output; }; ``` ### With `intervention/image` [](#with-interventionimage) ``` $compressor = function ( int $quality, string $originalPath, ) use ($manager, $tmpDir): string { $output = "{$tmpDir}/compressed_q{$quality}.webp"; $manager->read($originalPath)->toWebp($quality)->save($output); return $output; }; ``` --- PipelineResult Shape -------------------- [](#pipelineresult-shape) ``` $result->passed // bool $result->ssimScore // float e.g. 0.961423 $result->threshold // float e.g. 0.92 $result->qualityUsed // int — final quality used $result->attempts // int — number of retry attempts $result->originalSize // int — bytes $result->compressedSize // int — bytes $result->savingsPercent // float e.g. 68.4 $result->formatInput // string e.g. 'jpeg' $result->formatOutput // string e.g. 'webp' $result->durationMs // int — total pipeline time $result->outputPath // string — path to accepted output $result->warnings // string[] — any warnings $result->summary() // "Passed (SSIM: 0.961, Quality: 75, Saved: 68%, 143ms)" $result->savings() // "68%" $result->passed() // bool $result->failed() // bool $result->toArray() // array $result->toJson() // JSON string ``` SSIM Accuracy ------------- [](#ssim-accuracy) These are practical expectations aligned with the current test suite and generated fixtures (not universal guarantees for every image set). ScenarioExpectedIdentical imagesSSIM = 1.000000White vs blackSSIM < 0.05JPEG quality 95SSIM > 0.98JPEG quality 10SSIM < 0.92PNG vs 50% WebP0.85–0.995--- License ------- [](#license) MIT — see [LICENSE](LICENSE). ### Health Score 39 — LowBetter than 85% of packages Maintenance82 Actively maintained with recent releases Popularity7 Limited adoption so far Community6 Small or concentrated contributor base Maturity51 Maturing project, gaining track record Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Unknown Total 1 Last Release 91d ago ### Community Maintainers ![](https://www.gravatar.com/avatar/acf551384df4ef2ac01cd242fa6d3ffa5bbb9ce7a9d4c685923f27f9d38aa706?d=identicon)[rcsofttech85](/maintainers/rcsofttech85) --- Top Contributors [![rcsofttech85](https://avatars.githubusercontent.com/u/17738213?v=4)](https://github.com/rcsofttech85 "rcsofttech85 (1 commits)") --- Tags phpimagecompressionqualityverificationssim ### Code Quality TestsPHPUnit Static AnalysisPHPStan Code StylePHP CS Fixer Type Coverage Yes ### Embed Badge ![Health badge](/badges/rcsofttech-php-image-guard/health.svg) ``` [![Health](https://phpackages.com/badges/rcsofttech-php-image-guard/health.svg)](https://phpackages.com/packages/rcsofttech-php-image-guard) ``` ### Alternatives [ps/image-optimizer Image optimization / compression library. This library is able to optimize png, jpg and gif files in very easy and handy way. It uses optipng, pngquant, pngcrush, pngout, gifsicle, jpegoptim and jpegtran tools. 9141.7M25](/packages/ps-image-optimizer)[kinglozzer/tinypng TinyPNG PHP API 1294.3k2](/packages/kinglozzer-tinypng)[schmitzal/tinyimg Image compression for all pngs and jpgs uploaded to the backend (using the tinypng API) 16129.0k](/packages/schmitzal-tinyimg)[gtuk/image-optimizer PHP image optimizer for png, jpeg and gif files. It uses mozjpeg, pngquant and gifsicle for the optimization process 161.6k](/packages/gtuk-image-optimizer)[lciolecki/php-image-optimizer PHP image file optimizer (uses https://github.com/bensquire/php-image-optim) 347.4k](/packages/lciolecki-php-image-optimizer) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)