Seemingly, you can't omit the width the same way you do with the height. If you write -1 for the width and specify a number for the height it will return false
imagescale
(PHP 5 >= 5.5.0, PHP 7)
imagescale — Scale an image using the given new width and height
Descrierea
imagescale
( resource
$image
, int $new_width
, int $new_height = -1
, int $mode = IMG_BILINEAR_FIXED
) : resource|falseimagescale() scales an image using the given interpolation algorithm.
Notă:
Unlike many of other image functions, imagescale() does not modify the passed
image; instead, a new image is returned.
Parametri
-
image -
O resursă - imagine, întoarsă de una din funcțiile de creare a imaginilor, cum ar fi imagecreatetruecolor().
-
new_width -
The width to scale the image to.
-
new_height -
The 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_FIXEDor anything else (will use two pass).Notă:
IMG_WEIGHTED4is not yet supported.
Valorile întoarse
Return the scaled image resource on success sau false în cazul eșecului.
A se vedea și
- imagecopyresized() - Copy and resize part of an image
- imagecopyresampled() - Copy and resize part of an image with resampling
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