imagesavealpha
PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8
imagesavealpha - Whether to retain full alpha channel information when saving PNG images
Manual
imagesavealpha(
GdImage$image,
bool$enable ): bool
imagesavealpha sets the flag which determines whether to retain full alpha channel information (as opposed to single-color transparency) when saving PNG images.
Alphablending has to be disabled (imagealphablending($im, false))
to retain the alpha-channel in the first place.
Parameters
- image
A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor.
- enable
-
Whether to save the alpha channel or not. Defaults to false.
Return Values
Returns true on success or false on failure.
Changelog
| Version | Description |
| 8.0.0 | image expects a GdImage instance now; previously, a resource was expected. |