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php利用cookie自动登录方法

html前端页面代码如下:

< html >      < head >      < title > enter password </ title >      </ head >      < body >      < form   name = "forml"   method = "post"   action = "cookiebasedpasswordlogin.php" >        < table >          < tr >           < td   colspan = "2"   >             < div   align = "center" > < b > please specify the password </ b > </ div >           </ td >         </ tr >       < tr > >         < td >           < div   align = "right" > customer id </ div >         </ td >         < td >           < input   type = "text"   name = "username" >         </ td >       </ tr >       < tr >         < td >           < div   align = "right" > password </ div >         </ td >         < td >           < input   type = "password"   name = "password" >         </ td >       </ tr >       < tr >         < td   colspan = "2" >           < center >             < input   type = "submit"   name = "submit"   value = "login" >           </ center >         </ td >        </ tr >       </ table >      </ form >      </ body >      </ html >  

后端PHP代码如下:

<?php       $now  =  getdate ();       $storetime =  $now [ "weekday" ] .  " "  .  $now [ "month" ] . " "  .  $now [ "year" ] ;       $storetime .= " time : " ;       if  ( $now [ "hours" ] < 10) {         $storetime .=  "0"  .  $now [ "hours" ];      }  else  {         $storetime .=  $now [ "hours" ];      }           $storetime .=  ":" ;       if  ( $now [ "minutes" ]<10) {         $storetime .=  "0"  .  $now [ "minutes" ];      }  else  {         $storetime .=  $now [ "minutes" ];      }             $storetime .=  ": " ;       if  ( $now [ "seconds" ] <10) {         $storetime .=  "0"  .  $now [ "seconds" ];      }  else  {         $storetime .=  $now [ "seconds" ];      }       if  (isset( $data )) {          $counter =++ $data [l];          setcookie( "data[0]" , $storetime ,time() + (60*60*24));          setcookie( "data[l]" ,  $counter ,time() + (60*60*24)); setcookie( "data[2]" , $username ,time() + (60*60*24));           echo   "<b><center>hi "  .  $data [2] .  " ! !</center></b><br>n" ;           echo   "<b><center>last login time :"  . $data [0] .  "</center></b><br>n" ;           echo   "<b><center>current date :"  . $storetime .  "</center></b><br>n" ;           echo   "<b><center>page view count :"  .  $data [l].  "</center></b><br>n" ;           echo   "<b><center>you have successfully logged in!</center></b>" ;           echo  ( "<b><contor>you can access this area without entering a password for the next 24 hours!</center></b>" );     }  else  {       if  (isset( $username ) && isset( $password )) {        if  ( $password == "superpass" ) {             $counter =0;            setcookie( "data[0]" , $storetime ,time() + (60*60*24));            setcookie( "data[l]" , $counter ,time() + (60*60*24));            setcookie( "data[2]" , $username ,time() + (60*60*24));             $url = "location: cookieimp.php" ;            header( $url ); //开源代码phpfensi测试数据        } else {             echo   "<hl><center>invalid password!!!</center></hl>" ;       }      }    }    ?>  

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