/**
* Creates or returns an instance of this class.
*
* @since 0.1.0
* @return Twitterbot A single instance of this class.
*/
public static function get_instance()
{
if (null === self::$single_instance) {
self::$single_instance = new self();
}
return self::$single_instance;
}
die("Failed to acquire lock. Twitterbot may already be running.\n");
}
// this bit guarantees that the process is 1) detached, and 2) independent
echo 'Forking process into a daemon. Goodbye :)' . "\n";
if (pcntl_fork()) {
exit;
}
posix_setsid();
if (pcntl_fork()) {
exit;
}
// write the PIDs
fwrite($fp, getmypid() . "\n");
fflush($fp);
// start the loop
$engine = new Twitterbot();
$engine->loop();
// reaching this point means an exit command has been issued
flock($fp, LOCK_UN);
fclose($fp);
@unlink(TWITTERBOT_LOCKFILE);
/**
* Runs tests against the configuration of this bot, to make sure everything
* is in working order.
*/
function test()
{
// test the database connection parameters
echo "\n" . '==TESTING TWITTERBOT==' . "\n";
echo 'Testing MySQL connection...';
$db = @mysql_connect(DB_HOST, DB_USER, DB_PASS);
