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|  How to Implement Twilio Programmable Fax API in PHP

How to Implement Twilio Programmable Fax API in PHP

October 31, 2024

Learn how to seamlessly implement Twilio's Programmable Fax API using PHP with our step-by-step guide, detailed instructions, and practical examples.

How to Implement Twilio Programmable Fax API in PHP

 

Set Up Your Environment

 

  • Ensure that you have installed Composer for managing dependencies in your PHP project.
  • Install the Twilio SDK for PHP using Composer.

 

composer require twilio/sdk

 

Authentication and Initialization

 

  • Use your Twilio Account SID and Auth Token to authenticate API requests.
  • Initialize the Twilio client in your PHP script.

 

require 'vendor/autoload.php';
use Twilio\Rest\Client;

$sid = 'your_account_sid';
$token = 'your_auth_token';
$twilio = new Client($sid, $token);

 

Sending a Fax

 

  • Prepare your fax document in a format supported by Twilio (e.g., PDF, JPEG).
  • Use the Twilio client to send the fax by providing the required parameters.

 

try {
    $fax = $twilio->fax->v1->faxes
        ->create("recipient_fax_number", // to
            "https://example.com/your-document.pdf", // mediaUrl
            ["from" => "your_twilio_fax_number"]
        );

    echo "Fax SID: " . $fax->sid;
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}

 

Checking Fax Status

 

  • Fetch the status of a specific fax using its SID. This helps in tracking if the fax was successful or failed.

 

try {
    $fax = $twilio->fax->v1->faxes("fax_sid")->fetch();
    echo "Fax Status: " . $fax->status;
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}

 

Handling Fax Events with Webhooks

 

  • Set up a webhook URL that Twilio will call to update you about the fax status.
  • Use the webhook data to perform actions like logging or notifying users when a fax is sent or fails.

 

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $faxSid = $_POST['FaxSid'];
    $faxStatus = $_POST['FaxStatus'];

    // Process the webhook data
    if ($faxStatus == 'delivered') {
        echo "Fax $faxSid was successfully sent!";
    } elseif ($faxStatus == 'failed') {
        echo "Fax $faxSid failed to send.";
    }
}

 

Secure Your Application

 

  • Validate incoming requests to your webhook URL by verifying Twilio signatures. This ensures security and authenticity of the request.
  • Consider sanitizing all inputs and outputs to prevent security vulnerabilities.

 

use Twilio\Security\RequestValidator;

$validator = new RequestValidator($token);
$signature = $_SERVER["HTTP_X_TWILIO_SIGNATURE"];
$url = 'https://example.com/your-webhook';
$valid = $validator->validate($signature, $url, $_POST);

if ($valid) {
   // Process the verified request
} else {
   // Reject the request
}

 

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