(PHP 4 >= 4.3.2, PHP 5)
imagesavealpha — Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images
( resource $image
, bool $saveflag
You have to unset alphablending
(imagealphablending($im, false)), to use it.
Alpha channel is not supported by all browsers, if you have problem with
your browser, try to load your script with an alpha channel compliant
browser, e.g. latest Mozilla.
An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().
Whether to save the alpha channel or not. Default to FALSE.
Returns TRUE on success or FALSE on failure.
Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).