# Working with IAM server certificates with AWS SDK for PHP Version 3
<a name="iam-examples-working-with-certs"></a>

To enable HTTPS connections to your website or application on AWS, you need an SSL/TLS server certificate. To use a certificate that you obtained from an external provider with your website or application on AWS, you must upload the certificate to IAM or import it into AWS Certificate Manager.

The following examples show how to:
+ List the certificates stored in IAM using [ListServerCertificates](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#listservercertificates).
+ Retrieve information about a certificate using [GetServerCertificate](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#getservercertificate).
+ Update a certificate using [UpdateServerCertificate](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#updateservercertificate).
+ Delete a certificate using [DeleteServerCertificate](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#deleteservercertificate).

All the example code for the AWS SDK for PHP is available [here on GitHub](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/php/example_code).

## Credentials
<a name="examplecredentials"></a>

Before running the example code, configure your AWS credentials, as described in [Authenticating with AWS using AWS SDK for PHP Version 3](credentials.md). Then import the AWS SDK for PHP, as described in [Installing the AWS SDK for PHP Version 3](getting-started_installation.md).

## List server certificates
<a name="list-server-certificates"></a>

 **Imports** 

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
use Aws\Iam\IamClient;
```

 **Sample Code** 

```
$client = new IamClient([
    'profile' => 'default',
    'region' => 'us-west-2',
    'version' => '2010-05-08'
]);

try {
    $result = $client->listServerCertificates();
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## Retrieve a server certificate
<a name="retrieve-a-server-certificate"></a>

 **Imports** 

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
use Aws\Iam\IamClient;
```

 **Sample Code** 

```
$client = new IamClient([
    'profile' => 'default',
    'region' => 'us-west-2',
    'version' => '2010-05-08'
]);

try {
    $result = $client->getServerCertificate([
        // ServerCertificateName is required
        'ServerCertificateName' => 'string',
    ]);
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## Update a server certificate
<a name="update-a-server-certificate"></a>

 **Imports** 

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
use Aws\Iam\IamClient;
```

 **Sample Code** 

```
$client = new IamClient([
    'profile' => 'default',
    'region' => 'us-west-2',
    'version' => '2010-05-08'
]);

try {
    $result = $client->updateServerCertificate([
        // ServerCertificateName is required
        'ServerCertificateName' => 'string',
        'NewServerCertificateName' => 'string',
    ]);
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## Delete a server certificate
<a name="delete-a-server-certificate"></a>

 **Imports** 

```
require 'vendor/autoload.php';

use Aws\Exception\AwsException;
use Aws\Iam\IamClient;
```

 **Sample Code** 

```
$client = new IamClient([
    'profile' => 'default',
    'region' => 'us-west-2',
    'version' => '2010-05-08'
]);

try {
    $result = $client->deleteServerCertificate([
        // ServerCertificateName is required
        'ServerCertificateName' => 'string',
    ]);
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```