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Processing images in PHP is quite powerful, especially when using the GD library. This article will show you how to create a retro mirror image effect through imageflip() and imagefilter() functions. This special effect is commonly used in retro photography or film-style picture processing, and is both practical and artistic.
First, we need an original image, assuming the path is:
$source = 'https://m66.net/images/sample.jpg';
You can use local images or online resources, but make sure the image format is the supported type (such as JPEG, PNG).
Use imagecreatefromjpeg() to load the image, and then achieve horizontal flip through imageflip() to simulate the image effect:
<?php
$source = 'https://m66.net/images/sample.jpg';
$image = imagecreatefromjpeg($source);
// Mirror processing：Horizontal flip
imageflip($image, IMG_FLIP_HORIZONTAL);
Here we are using IMG_FLIP_HORIZONTAL , if you want to flip vertically or bidirectionally, you can also try other modes such as IMG_FLIP_VERTICAL or IMG_FLIP_BOTH .
Next, we add retro filters via imagefilter() . Common retro styles usually include reducing saturation, adding tan tones (Sepia), etc.
// Convert to grayscale image
imagefilter($image, IMG_FILTER_GRAYSCALE);
// Overlay yellow tones，Create a retro feel
imagefilter($image, IMG_FILTER_COLORIZE, 100, 50, 0);
// Increase contrast，Strengthening effect
imagefilter($image, IMG_FILTER_CONTRAST, -15);
Combining these filters will give the image the texture of the old photos with the mottled years.
After the processing is completed, you can output the image directly to the browser or save it as a new file:
// Output image to browser
header('Content-Type: image/jpeg');
imagejpeg($image);
// Or save as a new file
// imagejpeg($image, 'vintage_mirror.jpg');
// Clean up resources
imagedestroy($image);
?>
If you need more refined filter control, you can consider superimposing imagefilter() multiple times and try different numerical combinations.
Although PHP's GD library is not as good as professional image processing software, processing images in a web project is enough to meet most needs.
If you are using this feature in a dynamic website (such as https://m66.net/portfolio.php ), make sure the server has GD support enabled.
You can embed the above code into the test page, open it in your browser, and you can view the retro mirrored image generated in real time. If you want to enhance interactivity, you can also combine HTML forms to achieve the function of users uploading images and automatically applying filters.
