In the context of PHP image processing, what are some common reasons for memory exhaustion errors and how can they be efficiently resolved?

Memory exhaustion errors in PHP image processing often occur when working with large images or processing a high volume of images. To efficiently resolve this issue, you can optimize your code by freeing up memory after processing each image, using techniques like unset() to release memory allocated to variables that are no longer needed.

// Example code snippet to efficiently resolve memory exhaustion issues in PHP image processing

// Load image file
$image = imagecreatefromjpeg('image.jpg');

// Process image here...

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

// Unset any variables that are no longer needed to release memory
unset($image);