public function monthaddyuanbao($dau_date='')

    {

        $tmp_file = '/tmp/logday_a.txt';

        if(file_exists($tmp_file)){

          $runDay = file($tmp_file);

          $dau_date = date('Y-m-d',strtotime('-1 day',strtotime($runDay[count($runDay) - 1])));

          if($dau_date == '2017-06-30'){

              echo 'end';

              exit;

          }

        }

　　//...........此处写相关导数据的代码

$fp = fopen ( $tmp_file, 'a+' );

        fwrite ( $fp, $dau_date . "\r\n" );

    }

$fp = fopen ( $tmp_file, 'a+' );        fwrite ( $fp, $dau_date . "\r\n" );    }