Question

I’m working with the Microsoft Azure cloud and need to upload images there. Its class upload methods putBlob() and putBlobData() require either the data itself (not the resource) or the directory string as arguments, none of which is available before the image is actually written to the Blob.

$fp = fopen($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

You need to capture the buffer with ob_start, something like:

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

$i is your image blob