What are the best practices for handling email functionality in PHP and ASP scripts when combined in a project?

When combining PHP and ASP scripts in a project, it's important to ensure that email functionality works seamlessly across both platforms. One way to achieve this is by using a common email configuration file that can be included in both PHP and ASP scripts. This file should contain the necessary email settings such as SMTP server, port, username, and password. By centralizing the email configuration, you can easily maintain and update email functionality in your project.

// email_config.php

$email_config = array(
    'host' => 'smtp.example.com',
    'port' => 587,
    'username' => 'your_email@example.com',
    'password' => 'your_password'
);
```

In your PHP script, you can include the email configuration file and use the settings to send emails:

```php
// send_email.php

include 'email_config.php';

$to = 'recipient@example.com';
$subject = 'Test Email';
$message = 'This is a test email';

$smtp_host = $email_config['host'];
$smtp_port = $email_config['port'];
$smtp_username = $email_config['username'];
$smtp_password = $email_config['password'];

// Use PHP's mail function or a library like PHPMailer to send the email
// Example using PHP's mail function
mail($to, $subject, $message);