What are some best practices for handling image files generated in PHP for further processing?

When handling image files generated in PHP for further processing, it is important to properly manage the file resources to prevent memory leaks and ensure efficient processing. One best practice is to use functions like `imagecreatefromjpeg()`, `imagecreatefrompng()`, or `imagecreatefromgif()` to create image resources from the generated files, and then use `imagedestroy()` to free up memory once processing is complete.

// Example code snippet for handling image files generated in PHP

// Create image resource from a JPEG file
$image = imagecreatefromjpeg('generated_image.jpg');

// Perform processing on the image resource

// Free up memory by destroying the image resource
imagedestroy($image);