In what scenarios would it be advisable to save images to a file rather than dynamically rendering them in PHP for display and interaction purposes?

When dealing with large or frequently accessed images, it may be advisable to save them to a file rather than dynamically rendering them in PHP to improve performance and reduce server load. This is especially true for images that do not change frequently and can be cached for faster retrieval.

// Example code to save an image to a file and then display it

// Save the image to a file
$imageData = file_get_contents('https://example.com/image.jpg');
file_put_contents('saved_image.jpg', $imageData);

// Display the saved image
echo '<img src="saved_image.jpg" alt="Saved Image">';