如何从图像资源获取图像数据？

Question

我正在使用Microsoft Azure云，需要在那里上传图像。它的类上载方法putBlob（）和putBlobData（）需要数据本身（不是资源）或目录字符串作为参数，在将图像实际写入Blob之前，这两个参数都不可用。

$fp = fopen($tmp_name, 'r');
$data = fread($fp, filesize($tmp_name));
fclose($fp);

//Setup watermark destination
$new_watermarked_image_name = "watermark.jpg";

// Create image resources
$image = imagecreatefromstring($data); 
$watermark = imagecreatefrompng('images/watermark_large.png');
$copyright = imagecreatefrompng('images/copyright.png');

// Merge image resource s
$image = overlay_watermark_full_size($image, $watermark);  
$image = overlay_watermark_lower_right($image, $copyright);
imagejpeg($image, $new_watermarked_image_name, 100);

//put original image
$AzureStorageBlob->putBlob("uploads", "name", $tmp_name);
//put watermarked image
$AzureStorageBlob->putBlobData("uploads", "name", ?); // ? needs to be data

Answer 1

您需要使用ob_start捕获缓冲区，例如：

ob_start();
imagejpeg($tmp_img);
$i = ob_get_clean(); 

$ i是您的图像斑点