Upload a new avatar image to Flarum

upload-flarum-avatar.php

<?php

// See: https://gist.github.com/woganmay/4c15a0f7c16e41ab3a3ea1a73c595bf9
$api_url = sprintf("https://my.flarum.site/api/users/%s/avatar", $user->id);

// See: https://gist.github.com/woganmay/88f15e96fc019657a0e594366403b5cf
$token = $session->token;

$avatar_file = "/storage/avatars/1234.jpg"; // Absolute path preferred

$ch = curl_init($api_url);

curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'User-Agent: Opera/9.80 (Windows NT 6.2; Win64; x64) Presto/2.12.388 Version/12.15',
    'Content-Type: multipart/form-data',
    'Authorization: Token ' . $token
]);

curl_setopt($ch, CURLOPT_POST, TRUE);

curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'avatar' => curl_file_create($avatar_file, 'application/octet-stream', 'avatar')
]);

$result = curl_exec($ch);