如何从内存中将映像上传到PHP中的AWS S3? [英] How to upload image to AWS S3 in PHP from memory?

问题描述

所以我目前有一个使用AWS S3上载图像的上载系统.

So I currently have an upload system working using AWS S3 to upload images.

代码如下:

//Upload image to S3
$s3 = Aws\S3\S3Client::factory(array('key' => /*mykey*/, 'secret' => /*myskey*/,));

try {
    $s3->putObject(array(
        'Bucket' => "bucketname",
        'Key'    => $file_name,
        'Body'   => fopen(/*filelocation*/, 'r+')
    ));
} catch(Exception $e) {
    //Error
}

此图片可以是jpeg或png，我想在上传之前将其转换为png.为此，我使用:

This image can be a jpeg or png, and I want to convert it to a png before uploading. To do this I use:

//This is simplified, please don't warn about transparency, etc.
$image = imagecreatetruecolor($width, $height);
imagecopyresampled($image, $source, 0, 0, 0, 0, etc.);

所以我在内存中有这个$image对象.

So I have this $image object in memory.

我想将其上传到S3，而不必将其保存在本地，先上传然后在本地删除；这个额外的步骤似乎毫无意义.但是我不知道如何直接上传此$ image对象.

I want to upload this to S3 without having to save it locally, upload it and then delete it locally; this extra step seems pointless. But I can't work out how to upload this $image object directly.

有什么想法可以做到吗?我以为fopen()会创建与imagecreatetruecolor()类似类型的对象，但是我尝试将$ image对象传递给它，但它不起作用-但是如果我使用fopen()在本地打开图像，它会起作用).

Any ideas how this would be done? I'd assumed fopen() would create an object of a similar type to imagecreatetruecolor(), but I've tried passing the $image object in and it doesn't work - whereas it does if I open an image locally with fopen().

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