A PHP function that posts an update to Mastodon

postToMastodon.php

<?php

/*
Pass in an array of data with keys for `status`
e.g.
postToMastodon(array(
  'status'    => 'Hello, world!'
));

Include `reply_url` if you're responding to a post
e.g.
postToMastodon(array(
  'status'    => 'Hello, Jeremy!',
  'reply_url' => 'https://mastodon.social/@adactio/109343712638768951'
));
*/

function postToMastodon($data=array()) {

// Get your access token from /settings/applications in your Mastodon instance.
  $accessToken = 'XXXXXXXXXXXX';

// Swap out mastodon.social for your Mastodon instance
  $url = 'https://mastodon.social/api/v1/statuses';

  $fields['status'] = $data['status'];

  if (isset($data['reply_url'])) {
    if (stristr($data['reply_url'], '/@')) {
        $urlparts = parse_url($data['reply_url']);
        $pathparts = explode('/', $urlparts['path']);
        $toot_id = $pathparts[2];
        $fields['in_reply_to_id'] = $toot_id;
        $username = $pathparts[1];
        $fields['status'] = $username.' '.$fields['status'];
    }
}
  $headers = array(
      "Authorization: Bearer ".$accessToken,
      "Content-Type: application/json",
      "Accept: application/json",
      "Accept-Charset: utf-8"
  );

  $options = array(
      CURLOPT_URL => $url,
      CURLOPT_RETURNTRANSFER => TRUE,
      CURLOPT_POST => TRUE,
      CURLOPT_HTTPHEADER => $headers,
      CURLOPT_POSTFIELDS => json_encode($fields),
      CURLOPT_TIMEOUT => 20
  );

  $curl = curl_init();
  curl_setopt_array($curl, $options);
  $response = curl_exec($curl);
  curl_close($curl);

  return json_decode($response, true);

}

?>

Referenced in this blog post: Syndicating to Mastodon.