(PHP 5 >= 5.5.0, PHP 7, PHP 8)
imagescale — Scale an image using the given new width and height
$image
, int $new_width
, int $new_height = -1
, int $mode = IMG_BILINEAR_FIXED
) : resource|falseimagescale() scales an image using the given interpolation algorithm.
注意:
Unlike many of other image functions, imagescale() does not modify the passed
image; instead, a new image is returned.
image由图象创建函数(例如imagecreatetruecolor())返回的图象资源。
new_widthThe width to scale the image to.
new_heightThe height to scale the image to. If omitted or negative, the aspect ratio will be preserved.
mode
One of IMG_NEAREST_NEIGHBOUR,
IMG_BILINEAR_FIXED,
IMG_BICUBIC,
IMG_BICUBIC_FIXED or anything else (will use two
pass).
注意:
IMG_WEIGHTED4is not yet supported.
Return the scaled image resource on success 或者在失败时返回 false.