code: protected function parseCrontab( $crontab )
      {
          $lines = preg_split( '(\r\n|\r|\n)', $crontab );
          $this->crontab = array();
          foreach ( $lines as $line )
          {
              $line = trim( $line );
              if ( !empty( $line ) &&
                   ( $line[0] !== '#' ) &&
                   ( $line[0] !== ';' ) )
              {
                  $this->crontab[] = new Cronjob( $line );
              }
          }
      }
docs: Parse given cron table
  
  All lines, which are not empty or start with a # or ; character are
  considered cron lines parsed as such.
  
  @param string $crontab
  @return void