How to call function in mail script from notification

When you want to call a function in a mail script from a notification, you'll need to use a mechanism that allows the notification to communicate with the mail script. Here are a few approaches:

Using a callback function: You can define a callback function in your mail script that can be called by the notification. The notification can pass any necessary data to the callback function as arguments. For example:
```
// In your mail script
function myCallback($data) {
 // Process the data
 echo "Received data: $data";
}
```

// In your notification script $notification->setCallback('myCallback', array('some_data'));

2. **Using a shared memory or cache**: You can use a shared memory or cache mechanism (e.g., Redis, Memcached) to store the result of the function call in the mail script. The notification can then retrieve the result from the cache. For example:
```php
// In your mail script
function myFunction() {
    // Do some work
    return 'Result';
}

// Store the result in a cache
$cache->set('myFunctionResult', myFunction());

// In your notification script
$result = $cache->get('myFunctionResult');

Using a message queue: You can use a message queue (e.g., RabbitMQ, Apache Kafka) to send a message from the notification to the mail script. The mail script can then process the message and return the result. For example:
```
// In your mail script
function myFunction($data) {
 // Process the data
 return 'Result';
}
```

// In your notification script $queue->publish('myFunction', array('some_data'));

// In your mail script (listening to the queue) $queue->consume(function ($message) { $result = myFunction($message->getBody()); // Process the result });

4. **Using a RESTful API**: You can create a RESTful API in your mail script that the notification can call to execute the function. For example:
```php
// In your mail script
function myFunction() {
    // Do some work
    return 'Result';
}

// Create a RESTful API
$app->get('/myFunction', function () {
    return myFunction();
});

// In your notification script
$client = new GuzzleClient();
$result = $client->get('http://example.com/myFunction');

Choose the approach that best fits your use case and requirements.

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How to call function in mail script from notification