Front API: Basic PHP example of sending a message with an attachment using Front's API

send-message-with-attachment.php

<?php
	require './../vendor/autoload.php';

	use GuzzleHttp\Client;
	
	$client = new Client([
	    'base_uri' => 'https://api2.frontapp.com/',
	    'headers' => [
        	'Authorization' => 'Bearer [FRONT_API_TOKEN]',
        	'Content-Type' => 'multipart/form-data',
        	'Accept' => 'application/json'
    	]
	]);
	
  // Uses Front's POST /channels/:channel_id/messages endpoint to send a message with an attachment
  //   https://dev.frontapp.com/reference/messages-1#post_channels-channel-id-messages
	$res = $client->request('POST', 'channels/[FRONT_CHANNEL_ID]/messages', [
	    'multipart' => [
	        [
	            'name'     => 'attachments[0]',
	            'contents' => file_get_contents('image.png'),
	            'filename' => 'image.png'
	        ],
	        [
	        	'name' 	   => 'to[0]',
	        	'contents' => '[email protected]'
	        ],
	        [
	        	'name' 	   => 'subject',
	        	'contents' => 'Message subject'
	        ],
	        [
	        	'name' 	   => 'author_id',
	        	'contents' => '[FRONT_TEAMMATE_ID]'
	        ],
	        [
	        	'name' 	   => 'body',
	        	'contents' => 'Message body'
	        ]
	    ],
	]);

	print_r($res)
?>