cron.php

<?php

// load codebird
require __DIR__ . '/vendor/autoload.php';

// read configuration file -filename may be passed as argument
// (»php /path/to/cron.php johndoe« reads »/johndoe.json«) or
// falls back to »/configuration.json«
$file = (!empty($argv[1]))? $argv[1] : 'configuration';
$configurationJSON = file_get_contents(__DIR__ . '/' . $file . '.json');
if ($configurationJSON === false) {
    echo 'Error: Can not read the configuration file' . PHP_EOL;
    die();
}
$configuration = json_decode($configurationJSON, true);

// set access tokens
\Codebird\Codebird::setConsumerKey($configuration['configuration']['apiKey'], $configuration['configuration']['apiSecret']);
$cb = \Codebird\Codebird::getInstance();
$cb->setToken($configuration['configuration']['accessToken'], $configuration['configuration']['accessSecret']);

// select status message
$status = '';
$dateKey = date($configuration['configuration']['dateformat']);
if (!empty($configuration['statuses'][$dateKey])) {
    // special message exists
    $status = $configuration['statuses'][$dateKey];
} elseif (!empty($configuration['statuses']['default'])) {
    // fallback
    // pick random default status
    shuffle($configuration['statuses']['default']);
    $status = $configuration['statuses']['default'][0];
} else {
    echo 'Error: No valid status message found' . PHP_EOL;
    die();
}

// upload media files
$media = '';
if (!empty($status[1])) {
    $mediaUpload = $cb->media_upload(array(
        'media' => $status[1]
    ));
    $media = $mediaUpload->media_id_string;
}

// send tweet
$params = array(
    'status' => $status[0],
);
if (!empty($media)) {
    $params['media_ids'] = $media;
}
$cb->setReturnFormat(CODEBIRD_RETURNFORMAT_ARRAY);
$statusUpdate = $cb->statuses_update($params);

// show API response
if (isset($statusUpdate['id_str'])) {
    echo 'Success: Created tweet https://twitter.com/' . $statusUpdate['user']['screen_name'] . '/status/' . $statusUpdate['id_str'] . PHP_EOL;
} else {
    echo 'Error: Can not create tweet (' . print_r($statusUpdate['errors'], true) . ')' . PHP_EOL;
}