What are some best practices for optimizing performance when generating and displaying dynamic images in PHP?

When generating and displaying dynamic images in PHP, it is important to optimize performance to ensure fast loading times and efficient use of server resources. One best practice is to cache the generated images to reduce the need for repeated generation. Additionally, using image manipulation libraries like GD or Imagick can help improve processing speed.

// Example of caching generated images
$imagePath = 'path/to/generated/image.jpg';

if (!file_exists($imagePath)) {
    // Generate image if it doesn't exist
    // Code to generate image goes here

    // Save generated image to cache
    imagejpeg($image, $imagePath);
}

// Display cached image
echo '<img src="' . $imagePath . '" alt="Generated Image">';