如何从画布获取图像大小？

Question

Is it possible to get the image size in pixels from a canvas? 是否可以从画布获取以像素为单位的图像大小？

Eg I know I can achieve it getting the size from the image directly: 例如，我知道我可以实现直接从图像获取尺寸的方法：

list($width, $height) = @getimagesize($_FILES['inputFieldName']['tmp_name'])

but I want to get it from a canvas. 但我想从画布上得到它。 Eg: 例如：

$canvas = imagecreatefromjpeg($image_path);
//Get image size from $canvas

Answer 1

Try: 尝试：

$canvas = imagecreatefromjpeg($image_path);
$width = imagesx($canvas);
$height = imagesy($canvas);