如何使用PHP和GD获取以字节为单位的图像资源大小？ [英] How to get image resource size in bytes with PHP and GD?

问题描述

我正在使用php gd调整图像大小。结果是我想要上传到Amazon S3的图像资源。如果我先将图像存储在磁盘上但我想直接从内存上传它们，它的效果很好。如果我只知道图像的字节大小，那是可能的。

I'm resizing images with php gd. The result is image resources that i want to upload to Amazon S3. It works great if i store the images on disk first but i would like to upload them directly from memory. That is possible if i just know the bytesize of the image.

有没有办法获得gd图像资源的大小（以字节为单位）？

Is there some way of getting the size (in bytes) of an gd image resource?

推荐答案

您可以使用PHP的内存i / o流保存图像并随后获取大小（以字节为单位）。

You could use PHP's memory i/o stream to save the image to and subsequently get the size in bytes.

您所做的是：

$img = imagecreatetruecolor(100,100);
// do your processing here
// now save file to memory
imagejpeg($img, 'php://memory/temp.jpeg'); 
$size = filesize('php://memory/temp.jpeg');

现在您应该知道尺寸

我不知道任何（gd）方法来获取图像资源的大小。

I don't know of any (gd)method to get the size of an image resource.

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