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What potential pitfalls should developers be aware of when resizing images on the server for display on different screen sizes?

When resizing images on the server for display on different screen sizes, developers should be aware of potential loss of image quality or distortion if not done properly. To avoid this, developers should use libraries or tools that maintain image quality during resizing, such as the PHP GD library or ImageMagick.

php 
// Example code using PHP GD library to resize an image while maintaining quality
function resize_image($source_image_path, $new_image_path, $width, $height) {
    list($source_width, $source_height) = getimagesize($source_image_path);
    $source_image = imagecreatefromjpeg($source_image_path);
    $new_image = imagecreatetruecolor($width, $height);
    imagecopyresampled($new_image, $source_image, 0, 0, 0, 0, $width, $height, $source_width, $source_height);
    imagejpeg($new_image, $new_image_path, 100);
    imagedestroy($source_image);
    imagedestroy($new_image);
}

// Usage
resize_image('source_image.jpg', 'resized_image.jpg', 300, 200);

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