Are there any best practices for implementing fax sending functionality in PHP?

To implement fax sending functionality in PHP, you can use a third-party service like Twilio or eFax API. These services allow you to send faxes programmatically by making HTTP requests to their API endpoints. You will need to sign up for an account, obtain API credentials, and follow their documentation to send faxes from your PHP application.

// Example code using Twilio API to send a fax
require_once 'path/to/twilio-php/Services/Twilio.php';

$accountSid = 'YOUR_TWILIO_ACCOUNT_SID';
$authToken = 'YOUR_TWILIO_AUTH_TOKEN';
$twilioNumber = 'YOUR_TWILIO_NUMBER';
$recipientNumber = 'RECIPIENT_FAX_NUMBER';
$fileUrl = 'URL_TO_YOUR_PDF_FILE';

$client = new Services_Twilio($accountSid, $authToken);

$fax = $client->account->faxes->create(
    $twilioNumber,
    $recipientNumber,
    $fileUrl
);

echo 'Fax sent with SID: ' . $fax->sid;