Programmable Messaging PHP Quickstart
Ahoy there! All messaging transmitted using Twilio’s messaging channels is treated as Application-to-Person (A2P) messaging and subject to Twilio’s Messaging Policy. For detailed information on policy rules to ensure you remain compliant while using Twilio’s services, please see our Acceptable Use Policy.
In a few lines of code, your PHP application can send, receive, and reply to text messages with Twilio Programmable SMS.
This PHP SMS Quickstart shows you how to use our Communications REST API, the Twilio CLI, and the Twilio PHP helper library.
We’ll use the package manager Composer to manage our product dependencies. If you don’t want to use Composer, no problem — we also have a separate non-Composer PHP SMS Quickstart.
In this Quickstart, you’ll learn how to:
- Sign up for Twilio and purchase an SMS-enabled phone number.
- Check and install any prerequisites using Composer.
- Send your first SMS.
- Set up your development environment to send and receive messages.
- Receive inbound text messages.
- Reply to incoming messages with a return SMS.
Sign up — or into — Twilio
Already have a Twilio account? Go ahead and skip this section.
You can sign up for a free Twilio trial account here.
- When you sign up, you'll be asked to verify your personal phone number. This helps Twilio verify your identity and also allows you to send test messages to your phone from your Twilio account while in trial mode.
- Once you verify your number, you'll be asked a series of questions to customize your experience.
- Once you finish the onboarding flow, you'll arrive at your project dashboard in the Twilio Console. This is where you'll be able to access your Account SID, authentication token, find a Twilio phone number, and more.
If you don't currently own a Twilio phone number with SMS functionality, you'll need to purchase one. After navigating to the Buy a Number page, check the SMS box and click Search.
You’ll then see a list of available phone numbers and their capabilities. Find a number that suits your fancy and click Buy to add it to your account.
Install the Twilio CLI
We’ll need to use the Twilio CLI (command line interface) for a few tasks, so let’s install that now.
The suggested way to install twilio-cli
on macOS is to use Homebrew. If you don’t already have it installed, visit the Homebrew site for installation instructions and then return here.
Once you have installed Homebrew, run the following command to install twilio-cli
:
brew tap twilio/brew && brew install twilio
The suggested way to install twilio-cli
is by using Scoop, a command-line installer for Windows. If you don’t already have it installed, visit the Scoop site for installation instructions and then return here.
Note PowerShell will need to be run as an administrator to avoid common permission issues when installing via Scoop.
- Add the
twilio-cli
Bucket:
scoop bucket add twilio-scoop https://github.com/twilio/scoop-twilio-cli
- Install the app:
scoop install twilio
twilio-cli
can be installed using the Advanced Package Tool (apt
) on most distributions such as Debian, Ubuntu, and Mint.
To do so, run the following commands in your terminal:
wget -qO- https://twilio-cli-prod.s3.amazonaws.com/twilio_pub.asc \
| sudo apt-key add -
sudo touch /etc/apt/sources.list.d/twilio.list
echo 'deb https://twilio-cli-prod.s3.amazonaws.com/apt/ /' \
| sudo tee /etc/apt/sources.list.d/twilio.list
sudo apt update
sudo apt install -y twilio
For other installation methods, see the Twilio CLI Quickstart.
Log in to the Twilio CLI
Run twilio login
to get the Twilio CLI connected to your account. Visit the Twilio Console, and under Account Info, you’ll find your unique Account SID and Auth Token to provide to the CLI.
Next, we need to install PHP and the Twilio PHP Helper Library.
Install PHP and the Twilio PHP Helper Library
If you already have PHP and the Twilio PHP Helper Library installed in your working directory, feel free to skip this step and move on to sending your first text message.
To send your first SMS, let's make sure you’re set up with PHP and able to install Twilio’s PHP Helper library. When doing web development in PHP, we strongly suggest using Composer for package management. This Quickstart relies on Composer to install the PHP Helper library. If you choose not to use Composer, please visit our non-Composer PHP SMS Quickstart.
Install PHP
If you’re using a Mac or *nix machine, you may have PHP already installed. In your favorite terminal, run:
php --version
If it is not installed, follow the PHP installation instructions.
If you’re using a Windows machine, please follow the official PHP tutorial to install PHP.
While many versions of PHP 5.x and PHP 7.x will work for this Quickstart, please pay attention to supported PHP releases. Always update un-supported versions when doing web development, as older versions will not receive security updates.
Install Composer
Composer is the de facto standard package manager for PHP web development. If you haven’t yet installed it, here are the installation instructions for your platform:
If you’d prefer to install dependencies manually, check out our non-Composer PHP SMS Quickstart.
Install the Twilio PHP Helper Library
We need to install the Twilio PHP Helper Library in the directory where you will complete the Quickstart. If you are using Composer, there are two ways to do this.
First, from a terminal, you can run the following command:
composer require twilio/sdk
Alternatively, you can create a file named composer.json
and then add the following to it:
{
"require": {
"twilio/sdk": "^5.0"
}
}
Then run
composer install
And composer will grab the latest version of the Twilio PHP Helper Library.
Finally, for a non-composer installation follow the instructions here. You’ll also need to change the code samples as they appear in this Quickstart as shown in those instructions.
Send an outbound SMS with PHP
Now that we have PHP, Composer, and twilio-php
installed, we can make a single API request and send an outbound text message from our Twilio phone number. Create and open a new file called send_sms.php
and type or paste in this code sample.
Replace the placeholder Twilio credentials
Swap the placeholders in account_sid
and auth_token
with your personal Twilio credentials. Replace the values for account_sid
and auth_token
with your unique values.
While it’s easier to hardcode your credentials in a file for this quickstart, you should use environment variables to keep them secret in production. Check out how to set environment variables for more information, and see the code comments for an example of how to read them in PHP. This repo is also an excellent resource for dealing with environment variables.
Replace the twilio_number phone number
Earlier, you purchased an SMS-enabled phone number. Paste that number into the twilio_number
variable using E.164 formatting:
[+][country code][phone number including area code]
Replace the ‘To’ number in the create() call
The first value in the call to create()
is the outgoing phone number, currently set to +15558675310
. This can be any phone number that can receive text messages, but you should use a number you control first to witness the magic! As above, use E.164 formatting for this number.
Save the file then run the script:
php send_sms.php
Boom! Assuming all the values are correct, you should already see the SMS from your Twilio number on your phone.
Are your customers in the US or Canada? You can also send them MMS messages by adding just one line of code. Check out this guide to sending MMS to see how to do it.
If you are on a Twilio Trial account, your outgoing SMS messages are limited to phone numbers that you have verified with Twilio. Phone numbers can be verified via your Twilio Console’s Verified Caller IDs.
Receive and reply to inbound SMS messages with PHP
When someone sends an SMS to your Twilio phone number, Twilio makes an HTTP POST
request to your server asking for instructions on what to do next. For this Quickstart, we’ll reply to the sender with a note about how we're sending our SMS reply.
We’ll again use the Twilio PHP Library, then use PHP’s built-in development webserver in combination with ngrok to instruct Twilio how to handle the message. Create a new file reply_sms.php
in the same directory as send_sms.php
, open it, then copy and paste or type the following code.
If you’re not using the same directory as before, please follow the PHP Helper Library install step above.
Save the file, then start the PHP development server with:
php -S localhost:8000
In your favorite browser, open the URL http://localhost:8000/reply_sms.php.
If all went well, you should see TwiML in your browser with the message we’d like to reply with to all our inbound texts. And, yes, that’s all the code you need. But there’s just one more step you need to perform before everything is wired up.
If you don't already have ngrok downloaded and configured, follow these instructions to do so.
Configure ngrok and your webhook URL
We'll use ngrok to set up a tunnel from the public internet to your localhost. This will let us use a public URL as the webhook for your application.
First, download and configure ngrok.
Next, run this command to have ngrok set up a tunnel to your localhost:
ngrok http 8000
This will start an ngrok tunnel. Copy down the Forwarding URL that ends with ngrok.io
.
Then, you need to configure your Twilio phone number to call your webhook URL whenever a new message comes in:
- Go to Phone Numbers > Active Numbers in the Twilio Console.
- Select the SMS-enabled Twilio number you want to use.
- For the A MESSAGE COMES IN webhook, enter the ngrok URL you copied down earlier. Append
/reply_sms.php
to the end of the URL.
Test your application with a text
Now that everything is glued together, it’s time to test.
Send a text message from your mobile phone to your Twilio phone number. You’ll see a couple of things happen very quickly:
- Your PHP dev server will note a new connection.
- Twilio will forward your response back as an SMS!
Next steps
Now that you know the basics of sending and receiving SMS and MMS text messages with PHP, you might want to check out these resources:
- Our extensive API Reference documentation for Twilio SMS.
- Learn how to create an SMS conversation in PHP.
- Track the delivery status of your messages with PHP.
- Try TwilioQuest, our interactive, self-paced game that teaches you how to Twilio.
We hope you enjoyed the quickstart, and definitely can’t wait to see what you build!
Need some help?
We all do sometimes; code is hard. Get help now from our support team, or lean on the wisdom of the crowd by visiting Twilio's Stack Overflow Collective or browsing the Twilio tag on Stack Overflow.