php在s3导入的图像上添加水印

Question

我正在尝试在图像上添加水印。

图片和水印图片都是从aws s3导入的。

我尝试过这样做

      $watermark = tempnam(sys_get_temp_dir(), 'watermark.png');

        //save the file from s3 storage to the temporary file
        $content=$this->s3Manager->getFile('watermark.png',$this->verb,$watermark);
    // Set the margins for the stamp and get the height/width of the stamp image
        $marge_right = 10;
        $marge_bottom = 10;

list($watermark_width,$watermark_height) = getimagesize($watermark);

//Get the width and height of your image - we will use this to calculate where the watermark goes
$size = getimagesize($tempFile);

//Calculate where the watermark is positioned
//In this example, it is positioned in the lower right corner, 15px away from the bottom & right edges
$dest_x = $size[0] - $watermark_width - 15;
$dest_y = $size[1] - $watermark_height - 15;


imagecopy($tempFile, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height);
//Finalize the image:


        imagejpeg($tempFile);


        return $tempFile;

imagecopy 方法失败 -

"imagecopy() 期望参数 1 为资源，字符串中给出。

我检查了图像 a 是否由 dest_y 和 dest_x 成功导入，它们看起来没问题。

Answer 1

正如错误所说，imagecopy 需要一个资源。我假设 tempfile 是一个字符串。你可以这样做

$res = imagecreatefrompng($tempfile)

并将其传递给 imagecopy