(PHP 8 >= 8.1.0)
imageavif — 输出图象到浏览器或文件。
$image
, resource|string|null $file
= null
, int $quality
= -1
, int $speed
= -1
) : bool
Outputs or saves a AVIF Raster image from the given image
.
image
由图象创建函数(例如imagecreatetruecolor())返回的图象资源。
file
文件保存的路径,如果未设置或为 null
,将会直接输出原始图象流。
quality
quality
is optional, and ranges from 0 (worst quality, smaller file)
to 100 (best quality, larger file).
If -1
is provided, the default value 30
is used.
speed
speed
is optional, and ranges from 0 (slow, smaller file)
to 10 (fast, larger file).
If -1
is provided, the default value 6
is used.
成功时返回 true
, 或者在失败时返回 false
。
如果 libgd 输出图像失败,函数会返回 true
。