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# 结合使用 IAM 策略与 适用于 PHP 的 AWS SDK 版本 3
<a name="iam-examples-working-with-policies"></a>

您通过创建策略向用户授予权限。策略是一个文档，其中列出了用户可以执行的操作以及这些操作会影响的资源。默认情况下会拒绝未显式允许的任何操作或资源。可将策略附加到用户、用户组、用户代入的角色以及资源。

以下示例演示如何：
+ 使用 [CreatePolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#createpolicy) 创建托管策略。
+ 使用 [AttachRolePolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#attachrolepolicy) 将策略附加到角色。
+ 使用 [AttachUserPolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#attachuserpolicy) 将策略附加到用户。
+ 使用 [AttachGroupPolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#attachgrouppolicy) 将策略附加到组。
+ 使用 [DetachRolePolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#detachrolepolicy) 删除角色策略。
+ 使用 [DetachUserPolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#detachuserpolicy) 删除用户策略。
+ 使用 [DetachGroupPolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#detachgrouppolicy) 删除组策略。
+ 使用 [DeletePolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#deletepolicy) 删除托管策略。
+ 使用 [DeleteRolePolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#deleterolepolicy) 删除角色策略。
+ 使用 [DeleteUserPolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#deleteuserpolicy) 删除用户策略。
+ 使用 [DeleteGroupPolicy](https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-iam-2010-05-08.html#deletegrouppolicy) 删除组策略。

适用于 PHP 的 AWS SDKGitHub[ 上提供了](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/php/example_code)的所有示例代码。

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

运行示例代码之前，请配置您的 AWS 凭证，如 [AWS 使用 适用于 PHP 的 AWS SDK 版本 3 进行身份验证](credentials.md) 中所述。然后导入 适用于 PHP 的 AWS SDK，如 [安装 适用于 PHP 的 AWS SDK 版本 3](getting-started_installation.md) 中所述。

## 创建策略
<a name="create-a-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

$myManagedPolicy = '{
    "Version":"2012-10-17",		 	 	 
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "logs:CreateLogGroup",
            "Resource": "RESOURCE_ARN"
        },
        {
            "Effect": "Allow",
            "Action": [
            "dynamodb:DeleteItem",
            "dynamodb:GetItem",
            "dynamodb:PutItem",
            "dynamodb:Scan",
            "dynamodb:UpdateItem"
        ],
            "Resource": "RESOURCE_ARN"
        }
    ]
}';

try {
    $result = $client->createPolicy(array(
        // PolicyName is required
        'PolicyName' => 'myDynamoDBPolicy',
        // PolicyDocument is required
        'PolicyDocument' => $myManagedPolicy
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## 将策略附加到角色
<a name="attach-a-policy-to-a-role"></a>

 **导入**。

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

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

 **示例代码** 

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

$roleName = 'ROLE_NAME';

$policyName = 'AmazonDynamoDBFullAccess';

$policyArn = 'arn:aws:iam::aws:policy/AmazonDynamoDBFullAccess';

try {
    $attachedRolePolicies = $client->getIterator('ListAttachedRolePolicies', ([
        'RoleName' => $roleName,
    ]));
    if (count($attachedRolePolicies) > 0) {
        foreach ($attachedRolePolicies as $attachedRolePolicy) {
            if ($attachedRolePolicy['PolicyName'] == $policyName) {
                echo $policyName . " is already attached to this role. \n";
                exit();
            }
        }
    }
    $result = $client->attachRolePolicy(array(
        // RoleName is required
        'RoleName' => $roleName,
        // PolicyArn is required
        'PolicyArn' => $policyArn
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## 将策略附加到用户
<a name="attach-a-policy-to-a-user"></a>

 **导入**。

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

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

 **示例代码** 

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

$userName = 'USER_NAME';

$policyName = 'AmazonDynamoDBFullAccess';

$policyArn = 'arn:aws:iam::aws:policy/AmazonDynamoDBFullAccess';

try {
    $attachedUserPolicies = $client->getIterator('ListAttachedUserPolicies', ([
        'UserName' => $userName,
    ]));
    if (count($attachedUserPolicies) > 0) {
        foreach ($attachedUserPolicies as $attachedUserPolicy) {
            if ($attachedUserPolicy['PolicyName'] == $policyName) {
                echo $policyName . " is already attached to this role. \n";
                exit();
            }
        }
    }
    $result = $client->attachUserPolicy(array(
        // UserName is required
        'UserName' => $userName,
        // PolicyArn is required
        'PolicyArn' => $policyArn,
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## 将策略附加到组
<a name="attach-a-policy-to-a-group"></a>

 **导入**。

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

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

 **示例代码** 

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

try {
    $result = $client->attachGroupPolicy(array(
        // GroupName is required
        'GroupName' => 'string',
        // PolicyArn is required
        'PolicyArn' => 'string',
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## 分离用户策略
<a name="detach-a-user-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

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

## 分离组策略
<a name="detach-a-group-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

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

## 删除策略
<a name="delete-a-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

try {
    $result = $client->deletePolicy(array(
        // PolicyArn is required
        'PolicyArn' => 'string'
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```

## 删除角色策略
<a name="delete-a-role-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

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

## 删除用户策略
<a name="delete-a-user-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

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

## 删除组策略
<a name="delete-a-group-policy"></a>

 **导入**。

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

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

 **示例代码** 

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

try {
    $result = $client->deleteGroupPolicy(array(
        // GroupName is required
        'GroupName' => 'string',
        // PolicyName is required
        'PolicyName' => 'string',
    ));
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
}
```