In PHP, what are the differences between imagecopyresized and imagecopyresampled, and when should each be used for image manipulation?

When resizing images in PHP, the main differences between imagecopyresized and imagecopyresampled are in the quality of the resized image. imagecopyresized uses a simpler algorithm which may result in a lower quality image, especially when reducing the size significantly. On the other hand, imagecopyresampled uses a more sophisticated algorithm which produces higher quality resized images, especially when reducing the size. imagecopyresampled is recommended for most cases where image quality is important.

// Example of using imagecopyresampled for resizing images
$source = imagecreatefromjpeg('source.jpg');
$destination = imagecreatetruecolor(200, 200);
imagecopyresampled($destination, $source, 0, 0, 0, 0, 200, 200, imagesx($source), imagesy($source));
imagejpeg($destination, 'resized_image.jpg');
imagedestroy($source);
imagedestroy($destination);