Question

Is there a PHP function which can accept the image path of a PNG-24 as a parameter and then return a PNG-8 version on web browsers?

For example, the HTML code of the original PNG-24 is:

<img src="image/path/lorem.png">

And then this will return a PNG-8 version on web browsers:

<img src="convert-png24-to-pnp8.php?image/path/lorem.png">

The PNG-24 images I want to convert don’t have semi-transparent pixels but has completely transparent pixels.

Answer 1

Building on SERPRO’s answer above, using ImageMagick you could do something like:

$image = new Imagick("mypng24.png");
$image->setImageFormat("png8");
header( "Content-Type: image/png" );
echo $image;

That’s untested, but should give you something to go on. The formats ImageMagick can export as are listed here: http://www.imagemagick.org/script/formats.php