Method pcntlFork

/**
 * Method to return the exit code of a terminated child process.
 *
 * @return  integer  On success, the PID of the child process is returned in the parent's thread
 *                   of execution, and a 0 is returned in the child's thread of execution. On
 *                   failure, a -1 will be returned in the parent's context, no child process
 *                   will be created, and a PHP error is raised.
 *
 * @see     pcntl_fork()
 * @since   1.7.3
 */
protected function pcntlFork()
{
    return pcntl_fork();
}