Object Storage Service:Upload callbacks (PHP SDK V1)

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}
use OSS\Credentials\EnvironmentVariableCredentialsProvider;
use OSS\OssClient;

// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured.  
$provider = new EnvironmentVariableCredentialsProvider();
// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. 
$endpoint = "yourEndpoint";
// Specify the name of the bucket. Example: examplebucket. 
$bucket= "examplebucket";
// Specify the full path of the object. Example: exampledir/exampleobject.txt. Do not include the bucket name in the full path. 
$object = "exampledir/exampleobject.txt";

$config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,
        "signatureVersion" => OssClient::OSS_SIGNATURE_VERSION_V4,
        "region"=> "cn-hangzhou"
    );
    $ossClient = new OssClient($config);

// Configure a callback when you upload the object. 
// callbackUrl specifies the address of the callback server that receives the callback request. Example: https://oss-demo.aliyuncs.com:23450. 
// (Optional) Set callbackHost to the value of the Host field included in the callback request header. 
$url =
    '{
        "callbackUrl":"yourCallbackServerUrl",
        "callbackHost":"yourCallbackServerHost",
        "callbackBody":"bucket=${bucket}&object=${object}&etag=${etag}&size=${size}&mimeType=${mimeType}&imageInfo.height=${imageInfo.height}&imageInfo.width=${imageInfo.width}&imageInfo.format=${imageInfo.format}&my_var1=${x:var1}&my_var2=${x:var2}",
        "callbackBodyType":"application/x-www-form-urlencoded"
    }';

// Specify custom parameters for the callback request. Each custom parameter consists of a key and a value. The key must start with x:. 
$var =
    '{
        "x:var1":"value1",
        "x:var2":"value2"
    }';
$options = array(OssClient::OSS_CALLBACK => $url,
    OssClient::OSS_CALLBACK_VAR => $var
);
$result = $ossClient->putObject($bucket, $object, file_get_contents(__FILE__), $options);
print_r($result['body']);
print_r($result['info']['http_code']);

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}
use OSS\Credentials\EnvironmentVariableCredentialsProvider;
use OSS\OssClient;
use OSS\CoreOssException;
use OSS\Core\OssUtil;

// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured.  
$provider = new EnvironmentVariableCredentialsProvider();
// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. 
$endpoint = "yourEndpoint";
// Specify the name of the bucket. Example: examplebucket. 
$bucket= "examplebucket";
// Specify the full path of the object. Example: exampledir/exampleobject.txt. Do not include the bucket name in the full path. 
$object = "exampledir/exampleobject.txt";
// Specify the full path of the local file that you want to upload. Example: D:\\localpath\\examplefile.txt. By default, if you do not specify the full path of the local file, the local file is uploaded from the path of the project to which the sample program belongs. 
$uploadFile = "D:\\localpath\\examplefile.txt";

/**
 * Step 1: Initiate a multipart upload task and obtain the upload ID. 
 */

$config = array(
        "provider" => $provider,
        "endpoint" => $endpoint,
        "signatureVersion" => OssClient::OSS_SIGNATURE_VERSION_V4,
        "region"=> "cn-hangzhou"
    );
     $ossClient = new OssClient($config);
// An upload ID is returned. The ID is the unique identifier of a multipart upload task. You can initiate operations, such as canceling or querying a multipart upload task, based on the upload ID. 
$uploadId = $ossClient->initiateMultipartUpload($bucket, $object);

print(__FUNCTION__ . ": initiateMultipartUpload OK" . "\n");
/*
 * Step 2: Upload parts. 
 */
$partSize = 10 * 1024 * 1024;
$uploadFileSize = sprintf('%u',filesize($uploadFile));
$pieces = $ossClient->generateMultiuploadParts($uploadFileSize, $partSize);
$responseUploadPart = array();
$uploadPosition = 0;
$isCheckMd5 = true;
foreach ($pieces as $i => $piece) {
    $fromPos = $uploadPosition + (integer)$piece[$ossClient::OSS_SEEK_TO];
    $toPos = (integer)$piece[$ossClient::OSS_LENGTH] + $fromPos - 1;
    $upOptions = array(
        $ossClient::OSS_FILE_UPLOAD => $uploadFile,
        $ossClient::OSS_PART_NUM => ($i + 1),
        $ossClient::OSS_SEEK_TO => $fromPos,
        $ossClient::OSS_LENGTH => $toPos - $fromPos + 1,
        $ossClient::OSS_CHECK_MD5 => $isCheckMd5,
    );
    // Perform MD5 verification. 
    if ($isCheckMd5) {
        $contentMd5 = OssUtil::getMd5SumForFile($uploadFile, $fromPos, $toPos);
        $upOptions[$ossClient::OSS_CONTENT_MD5] = $contentMd5;
    }
    try {
        // Upload the parts. 
        $responseUploadPart[] = $ossClient->uploadPart($bucket, $object, $uploadId, $upOptions);
    } catch(OssException $e) {
        printf(__FUNCTION__ . ": initiateMultipartUpload, uploadPart - part#{$i} FAILED\n");
        printf($e->getMessage() . "\n");
        return;
    }
    printf(__FUNCTION__ . ": initiateMultipartUpload, uploadPart - part#{$i} OK\n");
}
// $uploadParts is an array that consists of the ETag and part number of each part. 
$uploadParts = array();
foreach ($responseUploadPart as $i => $eTag) {
    $uploadParts[] = array(
        'PartNumber' => ($i + 1),
        'ETag' => $eTag,
    );
}

/**
 * Step 3: Complete the multipart upload task. 
 */
// callbackUrl specifies the address of the callback server that receives the callback request. Example: http://oss-demo.aliyuncs.com:23450 or http://127.0.0.1:9090. 
// (Optional) Set callbackHost to the value of the Host field included in the callback request header. 
$json =
    '{
        "callbackUrl":"<yourCallbackServerUrl>",
        "callbackHost":"<yourCallbackServerHost>",
        "callbackBody":"{\"mimeType\":${mimeType},\"size\":${size},\"x:var1\":${x:var1},\"x:var2\":${x:var2}}",
        "callbackBodyType":"application/json"
    }';

// Specify custom parameters for the callback request. Each custom parameter consists of a key and a value. The key must start with x:. 
$var =
    '{
        "x:var1":"value1",
        "x:var2":"value2"
    }';
$options = array(OssClient::OSS_CALLBACK => $json,
    OssClient::OSS_CALLBACK_VAR => $var);
// Provide all valid $uploadParts when you perform this operation. After OSS receives the $uploadParts, OSS verifies all parts one by one. After all parts are verified, OSS combines the parts into a complete object. 
$ossClient->completeMultipartUpload($bucket, $object, $uploadId, $uploadParts, $options);

printf(__FUNCTION__ . ": completeMultipartUpload OK\n");