php - Upload to azure blob

I have a problem uploading files [images] to azure blob in REST API. my code in PHP:

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://STORAGE.blob.core.windows.net/PATH/NAME.png Shared_Access_Signature",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'PUT',
  CURLOPT_POSTFIELDS =>$postfields['file'],
  CURLOPT_HTTPHEADER => array(
    'x-ms-blob-type: BlockBlob',
    'Content-Type: multipart/form-data',   
    'Content-Type: image/png'
  ),
));

I see the file in the blob, but the file is invalid - the size of the original file is 200KB, but I see that the file size in BLOB is 600B. What is the problem?

Thanks!

Solution:

You can try the following code snippet by using Shared Key Authentication to upload an image to azure blob.

<?php
error_reporting(E_ALL);
ini_set('display_errors', 'On');
date_default_timezone_set('UTC');

$destinationURL = 'https://mystorage.blob.core.windows.net/blob1/image.jpg';
$accesskey = "qJXTMmw2Esal8/tXgfWk0RLwMNJ6OQKEt0E8EMZ8VhQrzGi5uqJqeKvi1l7iqnOddp7bdtai5rPpC6ynHttl1w==";
$storageAccount = 'mystorage';
$filetoUpload = realpath('./image.jpg');

function upload($filetoUpload, $storageAccount,$destinationURL,$accesskey) {
    $currentDate = date("D, d M Y H:i:s");

    $postFields = array(
        'extra_info' => '123456',
        'file_contents'=>'@'.$filetoUpload
    );

    $headerText=""
        ."x-ms-version: 2015-02-21\n"  
        ."x-ms-date:" .$currentDate." GMT\n"
        ."Content-Type: text/plain; charset=UTF-8\n"  
        ."x-ms-blob-content-disposition: attachment; filename=".$filetoUpload."\n"  
        ."x-ms-blob-type: BlockBlob\n"  
        ."x-ms-meta-m1: v1\n"  
        ."x-ms-meta-m2: v2\n"  
        ;

    $hash = hash_hmac('sha256', $headerText, base64_decode($accesskey), true);
    $sig = base64_encode($hash);

    $headerText.="Authorization: SharedKey ".$storageAccount.":".$sig."\n";
    $headerText.="Content-Length: 280";
    $headers = explode("\n", $headerText);

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($ch, CURLOPT_URL, $destinationURL);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    $result = curl_exec($ch);
    echo ('Result<br/>');
    print_r($result);
    echo ('Error<br/>');
    print_r(curl_error($ch));
    curl_close ($ch);
return;
}

upload($filetoUpload, $storageAccount,$destinationURL,$accesskey);