What are some common challenges developers face when working with transparency in PHP image processing?

One common challenge developers face when working with transparency in PHP image processing is handling alpha channels correctly. This includes ensuring that transparency is preserved when manipulating images and that blending modes are applied accurately. To address this, developers can use functions like imagealphablending() and imagesavealpha() to properly manage transparency settings.

// Enable alpha blending for transparent images
imagealphablending($image, true);

// Save alpha channel information when saving the image
imagesavealpha($image, true);