### Install APPPush via CocoaPods

Source: https://context7.com/apps4u/apppush/llms.txt

Instructions for adding the APPPush library to an iOS project using the CocoaPods dependency manager. This includes the Podfile configuration and the terminal command to install the dependency.

```ruby
platform :ios, '7.0'

target 'YourApp' do
  pod 'APPPush'
end
```

```bash
sudo gem install cocoapods
pod install apppush
```

--------------------------------

### Configure APPPush-Server Backend

Source: https://context7.com/apps4u/apppush/llms.txt

Example PHP implementation for the server-side component of APPPush. It demonstrates how to configure APNs certificates and provides functions for registering device tokens and sending push notifications.

```php
<?php
$apns_config = array(
    'certificate' => '/path/to/your/certificate.pem',
    'passphrase' => 'your_certificate_passphrase',
    'environment' => 'production',
);

function registerDevice($device_token, $app_id) {
    $query = "INSERT INTO devices (token, app_id, created_at)
              VALUES (?, ?, NOW())
              ON DUPLICATE KEY UPDATE updated_at = NOW()";
}

function sendPushNotification($device_token, $message, $badge = 1) {
    $payload = array(
        'aps' => array(
            'alert' => $message,
            'badge' => $badge,
            'sound' => 'default'
        )
    );
}
```

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