Are there any best practices for maintaining transparency when resizing PNG images in PHP?

When resizing PNG images in PHP, it is important to maintain transparency by preserving the alpha channel of the image. One way to achieve this is by using the imagecopyresampled() function instead of imagecopyresized(), as the former function maintains transparency while resizing the image. 

$source = imagecreatefrompng('original.png');
$width = imagesx($source);
$height = imagesy($source);
$destination = imagecreatetruecolor($newWidth, $newHeight);
imagealphablending($destination, false);
imagesavealpha($destination, true);
imagecopyresampled($destination, $source, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
imagepng($destination, 'resized.png');
imagedestroy($source);
imagedestroy($destination);

Keywords

PNG image resizing transparency PHP functions libraries

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