Object Storage Service:Check whether an object exists (PHP SDK V1)

Prerequisites

Before you begin, make sure that you have:

• The oss:GetObject permission on the target object. For details, see Attach a custom policy to a RAM user

• The OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables configured with valid credentials

Usage notes

• The example uses the public endpoint for the China (Hangzhou) region. To access OSS from another Alibaba Cloud service in the same region, replace the endpoint with the corresponding internal endpoint. For a full list of endpoints, see Regions and endpoints.

• The example creates an OSSClient instance using an OSS endpoint. To create an instance using a custom domain name or Security Token Service (STS), see Create an OSSClient instance.

Sample 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;

// Load credentials from environment variables.
// Set OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET before running this example.
$provider = new EnvironmentVariableCredentialsProvider();

// Replace with your actual endpoint. This example uses the China (Hangzhou) public endpoint.
$endpoint = "http://oss-cn-hangzhou.aliyuncs.com";
$bucket = "examplebucket";
$object = "exampledir/exampleobject.txt";

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

    $exist = $ossClient->doesObjectExist($bucket, $object);
} catch (OssException $e) {
    printf(__FUNCTION__ . ": FAILED\n");
    printf($e->getMessage() . "\n");
    return;
}
print(__FUNCTION__ . ": OK" . "\n");
var_dump($exist);

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