PHP Dialogflow API

A working PHP Dialogflow V2 API example using the DetectIntent method (SessionsClient::detectIntent()).

Requirements

• Dialogflow Agent with active V2 API
• Google Account Credentials file
• PHP 7.x
• Composer

How to

• Clone repo git clone https://bitbucket.org/labonte/php-dialogflow-api.git
• Enter directory cd php-dialogflow-api
• Use .env file or .htaccess file for configuration. Appropriate file templates can be found in the .env.dist and .htaccess.dist files.

For local testing (using a UNIX based OS)

• Create .env cp .env.dist .env
• Edit .env with your favorite editor (eg. vim .env)
• Run composer install
• Run php -S 127.0.0.1:8080 -t .

For "production" use (Using apache with mod_rewrite)

• Copy .htaccess cp .htaccess.dist .htaccess
• Edit .htaccess with your favorite editor (eg. vim .htaccess)
• Run composer install --no-dev
• Copy the following files and folders to your webserver
  • .htaccess (you have to create it first!)
  • DetectIntent.php
  • lib.php
  • vendor/
• According to the .htaccess you must place your Google Account Credentials file in a save place on your server. It's on you to ensure the file is not accessible from the web!

For use with nginx

Take a look into the .htaccess.dist file. You have to reproduce the those statements. The resulting config for your nginx location section should look something like this:

location /DetectIntent {    
    # Fill in!!!
    # Supply your Google Project ID and path to the credentials file.
    fastcgi_param GOOGLE_PROJECT_ID [YOUR PROJECT ID]
    fastcgi_param GOOGLE_APPLICATION_CREDENTIALS [YOUR GOOGLE APPLICATION CREDENTIALS FILE PATH]
    
    # Optionally change the maximum nesting level of your custom payload objects.
    fastcgi_param FULFILLMENT_MESSAGE_MAX_NESTING 64
    
    fastcgi_pass php;
    fastcgi_index DetectIntent.php;
    ...
}

I have not tested this!! The php upstream config is up to you.