imagesavealpha
imagesavealpha
(PHP 4 >= 4.3.2, PHP 5, PHP 7)
imagesavealpha — Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images
Description
bool imagesavealpha ( resource $image , bool $saveflag )
imagesavealpha() sets the flag to attempt to save full alpha channel information (as opposed to single-color transparency) when saving PNG images.
You have to unset alphablending (imagealphablending($im, false)), to use it.
Alpha channel is not supported by all browsers, if y