Get Started with PHP Using PHP Server

    Start by signing up for a free trial account that you can use to experiment with and learn about our services. The free trial account comes with free credits, and you can add more as you go along. You can also add a phone number to your account to start testing the full range of our voice and SMS features. A page in our support portal walks you through the signup process.

    You can start making and receiving calls either by using our PHLO visual workflow builder or our APIs and XML documents. Follow the instructions in one of the tabs below.

    Set up your PHP dev environment

    You must set up and install PHP and Plivo’s PHP SDK before you make your first call.

    Install PHP

    Follow the official PHP instructions to download and install PHP on macOS or Windows or Debian Linux, or use your favorite package manager to install PHP on any Linux distro.

    Install Composer

    We recommend using Composer, a dependency manager for PHP, as the package manager for your PHP projects.

    • Download the latest version of Composer.
    • Run this command in Terminal to run Composer.

       $ php ~/Downloads/composer.phar --version
      

      Note: PHAR (PHP archive) is an archive format for PHP that can be run on the command line.

    • Make it executable.

       $ cp ~/Downloads/composer.phar /usr/local/bin/composer
       $ sudo chmod +x /usr/local/bin/composer
      
      Move the file to bin directory.
    • To check whether the path includes /usr/local/bin, type

       $ echo $PATH
      

      If the path is different, update it.

       $ export PATH = $PATH:/usr/local/bin
       $ source ~/.bash_profile
      

      Note: If your path doesn’t include /usr/local/bin, we recommend adding it so that you can access it globally.

    • Download the Composer installer.

       $ curl -sS https://getcomposer.org/installer | php
      
    • Make the composer.phar file executable.

       $ chmod +x composer.phar
      

      Note: PHAR (PHP archive) is an archive format for PHP that can be run on the command line.

    • Make Composer globally available for all system users.

       $ mv composer.phar /usr/local/bin/composer
      

    • Download and run the Windows Installer for Composer.

      Note: Allow the installer to make changes to your php.ini file.

    • If you have any terminal windows open, close them all and open a fresh terminal instance.
    • Run the Composer command.

       $ composer -V
      

    Install the Plivo PHP SDK

    • Create a project directory and change into it.

      $ mkdir myphpapp
      $ cd myphpapp
      
    • To install the most recent release of the Plivo PHP SDK, run

      $ composer require plivo/plivo-php
      
    • Alternatively, download this source and run

      $ composer install
      

      This command generates autoload files, which you can include in your PHP source code to start using the SDK.

      <?php
      require 'vendor/autoload.php'
      

    Once you’ve set up your development environment, you can start making and receiving calls using PHLO, our visual workflow design studio, or using our APIs and XML documents. Here are three common use cases to get you started.

    Make your first outbound call

    You can create and deploy a PHLO to make an outbound call with a few clicks on the PHLO canvas, and trigger it with some simple code.

    Create the PHLO

    To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

    Create a PHLO for outbound calls

    • Click Create New PHLO.

    • In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.

      Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
    • From the list of components on the left side, drag and drop the Initiate Call component onto the canvas. When a component is placed on the canvas it becomes a node.

    • Draw a line to connect the Start node’s API Request trigger state to the Initiate Call node.

    • In the Configuration pane at the right of the canvas, configure the Initiate Call node with a caller ID in the From field. Enter the destination number you wish to call in the To field.

      Note: You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through Liquid templating parameters when you trigger the PHLO from your application.
    • Once you’ve configured the node, click Validate to save the configuration.

    • Similarly, create a node from the Play Audio component. Connect the Initiate Call node to the Play Audio node using the Answered trigger state.

    • Configure the Play Audio node to play a message to the user by entering text in the Speak Text box in the Prompt section of the Configuration pane — for example, “Hello, you just received your first call.”

    • Connect the Initiate Call node’s Answered trigger state to the Play Audio node.

    • After you complete the configuration, give the PHLO a name by clicking in the upper left, then click Save.

    Your PHLO is now ready to test.

    Trigger the PHLO

    You integrate a PHLO into your application workflow by making an API request to trigger the PHLO with the required payload — the set of parameters you pass to the PHLO. You can define a static payload by specifying values when you create the PHLO, or define a dynamic payload by passing values through parameters when you trigger the PHLO from your application.

    In either case, you need your Auth ID and Auth Token, which you can get from the overview page of the Plivo console.

    AUTHID

    You also need the PHLO ID, which you can copy from the PHLO list page.

    PHLO List

    With a static payload

    When you configure values when creating the PHLO, they act as a static payload.

    With Static Payload

    Code

    Create a file called TriggerPhlo.php and paste into it this code.

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    <?php
    require 'vendor/autoload.php';
    use Plivo\Resources\PHLO\PhloRestClient;
    use Plivo\Exceptions\PlivoRestException;
    $client = new PhloRestClient("<auth_id>", "<auth_token>");
    
    $phlo = $client->phlo->get("<phlo_id>");
    try {
        $response = $phlo->run();
        print_r($response);
    } catch (PlivoRestException $ex) {
        print_r($ex);
    }
    

    Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console.

    With a dynamic payload

    To use dynamic values for the parameters, use Liquid templating parameters when you create the PHLO and pass the values from your code when you trigger it.

    With Dynamic Payload

    Code

    Create a file called TriggerPhlo.php and paste into it this code.

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    <?php
    require 'vendor/autoload.php';
    use Plivo\Resources\PHLO\PhloRestClient;
    use Plivo\Exceptions\PlivoRestException;
    $client = new PhloRestClient("<auth_id>", "<auth_token>");
    
    $phlo = $client->phlo->get("<phlo_id>");
    try {
        $response = $phlo->run(["from" => "<caller_id>", "to" => "<destination_number>"]);
        print_r($response);
    } catch (PlivoRestException $ex) {
        print_r($ex);
    }
    

    Replace the auth placeholders with your authentication credentials from the Plivo console. Replace the phlo_id placeholder with your PHLO ID from the Plivo console. Replace the phone number placeholders with actual phone numbers in E.164 format (for example, +12025551234).

    Test

    Save the file and run it.

    $ php TriggerPhlo.php
    
    Note: If you’re using a Plivo Trial account, you can make calls only to phone numbers that have been verified with Plivo. You can verify (sandbox) a number by going to the console’s Phone Numbers > Sandbox Numbers page.

    Receive your first inbound call

    You can create and deploy a PHLO to receive an inbound call with a few clicks on the PHLO canvas, without writing a single line of code.

    Prerequisite

    To receive incoming calls, you must have a voice-enabled Plivo phone number. You can rent numbers from the Numbers page of the Plivo console, or by using the Numbers API.

    Create the PHLO

    To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

    Create a PHLO to receive incoming call

    • Click Create New PHLO.
    • In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
      Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
    • From the list of components on the left side, drag and drop the Play Audio component onto the canvas. When a component is placed on the canvas it becomes a node.
    • Draw a line to connect the Start node’s Incoming Call trigger state to the Play Audio node.
    • In the Configuration pane at the right of the canvas, configure the Play Audio node to play a message to the caller.
    • Once you’ve configured the node, click Validate to save the configuration.
    • Give the PHLO a name by clicking in the upper left, then click Save.

    Assign the PHLO to a Plivo number

    Once you’ve created and configured your PHLO, assign it to a Plivo number.

    • On the Numbers page of the console, under Your Numbers, click the phone number you want to use for the PHLO.
    • In the Number Configuration box, select PHLO from the Application Type drop-down.
    • From the PHLO Name drop-down, select the PHLO you want to use with the number, then click Update Number.

    Assign PHLO to a Plivo Number

    Test

    You can now make a call to your Plivo phone number and see how the inbound call is handled.

    For more information about creating a PHLO application, see the PHLO Getting Started guide. For information on components and their variables, see the PHLO Components Library.

    Forward an inbound call

    You can create and deploy a workflow to implement call forwarding with a few clicks on the PHLO canvas.

    Prerequisite

    To receive incoming calls, you must have a voice-enabled Plivo phone number. You can rent numbers from the Numbers page of the Plivo console, or by using the Numbers API.

    Create the PHLO

    To create a PHLO, visit the PHLO page of the Plivo console. If this is your first PHLO, the PHLO page will be empty.

    Create a PHLO to receive incoming call

    • Click Create New PHLO.
    • In the Choose your use case pop-up, click Build my own. The PHLO canvas will appear with the Start node.
      Note: The Start node is the starting point of any PHLO. It lets you trigger a PHLO to start upon one of three actions: incoming SMS message, incoming call, or API request.
    • From the list of components on the left side, drag and drop the Call Forward component onto the canvas. When a component is placed on the canvas it becomes a node.

    • Draw a line to connect the Start node‘s Incoming Call trigger state to the Call Forward node.

    • In the Configuration tab at the right of the canvas, configure the Call Forward node to select the From number using a variable. Enter two curly brackets to view all available variables, and choose the appropriate one. Enter all the numbers you want to call in the To field, separated with commas.

    • Once you’ve configured the node, click Validate to save the configuration.
    • Give the PHLO a name by clicking in the upper left, then click Save.

    Assign the PHLO to a Plivo number

    Once you’ve created and configured your PHLO, assign your PHLO to a Plivo number.

    • On the Numbers page of the console, under Your Numbers, click the phone number you want to use for the PHLO.
    • In the Number Configuration box, select PHLO from the Application Type drop-down.
    • From the PHLO Name drop-down, select the PHLO you want to use with the phone number, then click Update Number.

    Assign PHLO to a Plivo Number

    Test

    You can now call your Plivo phone number and see how the inbound call is forwarded.

    For more information about creating a PHLO application, see the PHLO Getting Started guide. For information on components and their variables, see the PHLO Components Library.

    More use cases

    We illustrate more than 20 use cases with code for both PHLO and API/XML on our documentation pages.

    Install PHP and the Plivo PHP Server SDK

    You must set up and install PHP and Plivo’s PHP SDK to make your first call. Here’s how.

    Install PHP

    Operating SystemInstructions
    macOSYou can install PHP using the official installer. You can also install it from here.
    LinuxTo install PHP on Linux you can find the instructions here.
    WindowsTo install PHP on Windows you can use the official installer.

    Install Composer

    Composer is a dependency manager for PHP that is used in all modern PHP frameworks, such as Symfony and Laravel. We highly recommend using Composer as the package manager for your web project.

    1. Download the latest version of Composer.
    2. Run the following command in Terminal in order to run the composer:

       $ php ~/Downloads/composer.phar --version
      

      Note: PHAR (PHP archive) is an archive format for PHP that can be run on the command line

    3. Run the following command to make it executable:

       $ cp ~/Downloads/composer.phar /usr/local/bin/composer
       $ sudo chmod +x /usr/local/bin/composer
       $ Make sure you move the file to bin directory.
      
    4. To check if the path has /usr/local/bin, use

       $ echo $PATH
      

      If the path is different, use the following command to update the $PATH:

       $ export PATH = $PATH:/usr/local/bin
       $ source ~/.bash_profile
      

      Note: If your PATH doesn’t include /usr/local/bin directory, we recommend adding it so that you can access it globally.

    5. You can also check the version of Composer by running the following command:

       $ composer --version.       
      

    1. Run the following command:

       $ curl -sS https://getcomposer.org/installer | php
      
    2. Run the following command to make the composer.phar file as executable:

       $ chmod +x composer.phar
      

      Note: PHAR (PHP archive) is an archive format for PHP that can be run on the command line

    3. Run the following command to make Composer globally available for all system users:

       $ mv composer.phar /usr/local/bin/composer
      

    1. Download and run the Windows Installer for Composer.

      Note: Make sure to allow Windows Installer for Composer to make changes to your php.ini file.

    2. If you have any terminal windows open, close all instances and open a fresh terminal instance.
    3. Run the Composer command.

       $ composer -V
      

    Install Plivo PHP Package

    • Create a project directory, run the following command:

      $ mkdir myphpapp
      
    • Change the directory to our project directory in the command line:

      $ cd myphpapp
      
    • To install the stable release, run the following command in the project directory:

      $ composer require plivo/plivo-php
      
    • To install a specific release, run the following command in the project directory:

      $ composer require plivo/plivo-php:4.3.1
      
    • To test the features in the beta release, run the following command in the project directory:

      $ composer require plivo/plivo-php:v4.2-beta1
      
    • Alternatively, you can download this source and run

      $ composer install
      

    This generates the autoload files, which you can include using the following line in your PHP source code to start using the SDK.

    <?php
    require 'vendor/autoload.php'
    

    Make your first Outbound Call

    Prerequisites

    This section will guide you through how to use Plivo APIs to make voice calls from your application. First, let’s make sure you meet these prerequisites before we dive into the code.

    • Plivo Auth Id and Auth Token: You will find your Plivo Auth Id and Auth Token on the home screen of your Plivo Console. Click here to sign-up for a Plivo account if you haven’t already!

      Find Your Auth Credentials on Plivo Console

    • Plivo Phone Number(Optional): Purchase numbers from the Numbers section of your Plivo Console and use the same as the caller ID for the outbound call. This number will also help you receive incoming calls as you must have a voice-enabled Plivo phone number to do the same. Please note that you can also purchase numbers using the Numbers API.

      Buy a New Plivo Number

    • Answer Url: When a call is answered by the destination_number, you can control the call flow with the help of the answer_url set in the API request. Plivo will invoke the answer_url specified as soon as the call is answered and expect a valid XML response with instructions to handle the call. For example, you can use https://s3.amazonaws.com/static.plivo.com/answer.xml as answer_url to test your first outgoing call. The XML response of this is:

      <Response>
      <Speak>Congratulations! You've made your first outbound call!</Speak>
      </Response>
      

      As you can tell, the XML above holds instructions to say ‘Congratulations! You’ve made your first outbound call!’ to the callee. You can find the entire list of Plivo XML verbs and their details in the XML Reference section of the website here.

    Now, create a file called MakeCall.php and paste the following code:

    Code

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    <?php
    require 'vendor/autoload.php';
    use Plivo\RestClient;
    
    $auth_id    = "Your AUTH_ID";
    $auth_token = "Your AUTH_TOKEN";
    $client     = new RestClient($auth_id, $auth_token);
    
    $response = $client->calls->create('+14151234567',
                                     ['+14157654321'],
                                     'http://s3.amazonaws.com/static.plivo.com/answer.xml',
                                     'GET');
    print_r($response);
    
    Note:
    • Replace the placeholders auth_id & auth_token with your credentials from yourPlivo Console.
    • We recommend that you store your credentials in the auth_id & auth_token environment variables, so as to avoid the possibility of accidentally committing them to source control. If you do this, you can initialize the client with no arguments and it will automatically fetch them from the environment variables
    • You can use $_ENV or putenv/getenv function to store environment variables and fetch them while initializing the client.
    • Replace the placeholder +14151234567 with the Phone number which you have purchased and +14157654321 with the phone number you will be making calls to.
    • Both +14151234567 and +14157654321 should be in E.164 format

    Save the file and use the following command to run your code.

    php MakeCall.php
    
    Note: If you are using a Plivo Trial account for this example, you can only make calls to phone numbers that have been verified with Plivo. Phone numbers can be verified at the Sandbox Numbers page.

    Receive Your First Inbound Call

    Prerequisites

    In addition to having at least one voice-enabled Plivo phone number that is needed to receive incoming calls (as was mentioned earlier), you need the following:

    Answer URL & Callback URLs

    When a call is received on a Plivo voice-enabled number, you can control the call flow by declaring an answer URL for your Plivo application associated with that Plivo phone number. Plivo will invoke the answer URL specified and expect a valid XML response to handle the call.

    Notice how the concept of Answer URLs applies to both outbound API calls as well as incoming calls to your Plivo numbers. In the outbound API call example above, we specified the answer URL along with the make call API request, whereas in the case of incoming calls to Plivo numbers, the answer URL is specified in the Plivo application associated with the phone number.

    In addition to requests to the answer URL, Plivo initiates HTTP requests to your application server through the course of a call based on the specific XML elements in your answer XML. Such requests can be broadly classified into two categories:

    Action URL requests: XML instructions to carry forward the call are expected in response to these requests. These requests are typically invoked at the end of an XML element’s execution. For example: when an IVR input is received from the caller during a GetInput XML execution.

    Callback URL requests: No XML instructions are expected in response to these requests. Such requests serve as webhooks to notify your application server of important events through the course of an XML element’s execution. For example: when a conference participant is muted or unmuted.

    Web Server

    To be able to host Answer and Callback URLs and to be able to provide valid XMLs and accept notifications on these URLs respectively, you need to host a webserver at your end.

    Set up PHP server for Incoming Calls & Callbacks.

    In this section, we’ll walk you through how to set up a PHP server in under five minutes and start handling incoming calls & callbacks.

    Use the following code snippet to start a local server.

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    <?php
        require '../vendor/autoload.php';
        use Plivo\XML\Response;
    
        $response = new Response();
        $speak_body = "Hello, you just received your first call";
        $response->addSpeak($speak_body);
    
        Header('Content-type: text/xml');
        echo($response->toXML());
    ?>
    

    Save this code in any file (name the file something like receive_call.php). To run this file on the server, go to the folder where this file resides and use the following command:

    php -S localhost:8000
    

    You can choose to run it on any other IP or port that your machine has access to. You should see your basic server app in action on http://localhost:8000/receive_call.php

    Exposing your local server to the internet

    To receive incoming calls and to handle callbacks, your local server should be able to connect with the Plivo API service. Ngrok is a tunneling software used to expose a web server running on your local machine to the internet. Using Ngrok you can set webhooks that can talk to the Plivo server.

    ngrok block diagram

    You can download and install ngrok from here. Follow the detailed configuration instructions to get started.

    Run ngrok on the port which currently hosts your application. For example, if your port number is 80, run the following command:

    ./ngrok http <port_on_which_your_local_server_is_running>
    

    This will give you a UI with links that look like ngrok.io/* which you can use to access your local server using the public network.

    Sample ngrok CLI

    Create a Plivo Application

    1. Create an Application by visiting the Application Page and clicking on New Application. You can also use Plivo’s Application API.
    2. Give your application a name. Let’s call it Receive_call. Enter your server URL (e.g. http://example.com/receive_call.php) in the Answer URL field and set the method as POST. See our Application API docs to learn how to modify your application through our APIs.
    3. Click on Create Application to save your application.

    Create Application

    Assign a Plivo number to your app

    1. Navigate to the Numbers page and select the phone number you want to use for this app.
    2. Select Receive Call (name of the app) from the Plivo App dropdown list.
    3. Click on Update to save.

    Assign Phone Number to Receive Call App

    Test and validate

    Make a call to your Plivo number using a regular mobile phone. Plivo will send a request to your Answer URL requesting for a valid XML response and process the call. Meanwhile, the parameters listed in the XML Request - call status documentation will also be sent to your server.

    Forward an Incoming call

    To forward an incoming call, you need to use Dial XML.

    • You should set up the dial XML document in your server
    • URL of the dial XML in your server has to be set up as the answer_url of the app assigned to the Plivo number.
    • During an incoming call to your Plivo number, Plivo will send a request to the answer_url expecting a valid XML to process the incoming call.
    • As the response would be a dial XML, the call will be forwarded to the number defined in the XML response.
    Note: The phone number must be a Plivo phone number that is voice-enabled. You can purchase a Plivo number from the Buy Numbers tab on your Plivo Console and filter the phone numbers by selecting voice in the features option to buy voice-enabled numbers.

    Create a file called forward_call.php and paste the following code.

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    <?php
        require '../vendor/autoload.php';
        use Plivo\XML\Response;
    
        $response = new Response();
    
        $params = array(
            'action' => "https://www.foo.com/dial_status/",
            'method' => "POST",
            'redirect' => "true"
        );
    
        $dial = $response->addDial($params);
        $number = "14153336666";  // call wll be forwarded to this number
        $dial->addNumber($number);
    
        Header('Content-type: text/xml');
        echo($response->toXML());
    
    Note: Create an application in the Plivo console with your Server URL in the answer_url field and assign the app to a Plivo number.

    Test and validate

    Make a call to your Plivo number using a regular mobile phone. Plivo will send a request to your Answer URL requesting for a valid XML response and process the call. Once Plivo receives the dial XML response, the call will be forwarded to the number defined in the XML. Meanwhile, the parameters listed in the XML Request - call status documentation will also be sent to your server.