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> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

# 添加自定义代码

> 学习如何为您的 PHP SDK 添加自定义逻辑、方法和依赖项。扩展 Fern 生成的 PHP 客户端的分步指南。

本页面介绍如何为您的 PHP SDK 添加自定义逻辑、方法和依赖项。

> **Note**
>
> These steps cover adding a new custom file to the SDK. To preserve line-level edits to a generated file, use [Replay](/learn/sdks/overview/custom-code#replay) instead.

## 添加自定义逻辑

开始添加自定义代码：

#### 创建新文件并添加您的自定义逻辑

**`src/Helper.php`**

```php title="src/Helper.php"
<?php

namespace YourNamespace;

class Helper
{
    public static function myHelper(): void
    {
        echo "Hello World!";
    }
}
```

#### 将您的文件添加到 \`.fernignore\`

**`.fernignore`**

```yaml {3} title=".fernignore"
# Specify files that shouldn't be modified by Fern

src/Helper.php
```

#### 使用辅助方法

Now your users can consume the helper function by importing it from the SDK.

```php
<?php

use YourNamespace\Helper;

Helper::myHelper();
```

## 添加自定义 SDK 方法

Fern also allows you to add custom methods to the SDK itself (e.g.
`client.my_method()` ) by inheriting the Fern generated client and then
extending it.

#### 更新 \`generators.yml\` 配置

将您的 Fern 生成的客户端命名为类似 `BaseClient` 的名称，以反映此客户端将被扩展。

**`generators.yml`**

```yaml {4} title="generators.yml"
- name: fern-php-sdk
  version: 2.30.8
  config:
    clientName: BaseClient
```

#### 导入并扩展生成的客户端

首先，导入 Fern 生成的基础客户端并扩展它。然后，添加您想要的任何方法。

**`src/MyClient.php`**

```php title="src/MyClient.php"
<?php

namespace YourNamespace;

class MyClient extends BaseClient
{
    public function myHelper(): void
    {
        echo "Hello World!";
    }
}
```

#### 更新 \`.fernignore\`

将 `MyClient.php` 添加到 `.fernignore`。

**`.fernignore`**

```diff title=".fernignore"
+ src/MyClient.php
```

#### 使用方法

您的用户将构造扩展的客户端，而不是构造生成的客户端。

```php
<?php

use YourNamespace\MyClient;

$client = new MyClient();
```

Now your users can consume the helper function by importing it from the SDK.

```php
$client->myHelper();
```

## 添加自定义依赖项

要添加您的自定义代码所需的包，请使用 `composerJson` 配置选项更新您的 `generators.yml`。

**`generators.yml`**

```yaml {4-8} title="generators.yml"
- name: fern-php-sdk
  version: 2.30.8
  config:
    composerJson:
      require:
        guzzlehttp/guzzle: "^7.0"
      require-dev:
        phpunit/phpunit: "^10.0"
```