_assoc($data));

            return true;
        }
        else
            return false;

       }

    public function isDataValid()
    {
        return (preg_match('/[^a-zA-Z0-9]$/',  $this->username) && preg_match('/[^a-zA-Z0-9]$/',  $this->password))? 1:0;
    }

    public function tokenValid()
    {
        return (!isset($_SESSION['ltoken']) || $this->ltoken!= $_SESSION['ltoken'])? 0 : 1;
    }

    public function registerSession()
    {
        $_SESSION['ID']       = $this->id;
        $_SESSION['username'] = $this->username;
        $_SESSION['password'] = $this->passmd5;
    }

    public function sessionExist()
    {
        return (isset($_SESSION['username']) && isset($_SESSION['password']))? 1 : 0;
    }

    public function show_errors()
    {
        foreach($this->errors as $value)
            echo $value."</br>";
    }

}

?>

Here is the login_form.php
<?php
$check = 0;
$ltoken = $_SESSION['ltoken'] = md5(uniqid(mt_rand(), true));
if(isset($_POST['login']))
{
    $check = 1;
    include('class_login.php');

    $login = new class_login();

    if ($login->isLoggedIn())
        echo "Success!";
    else
        $login->show_errors();

}
?>

<link rel="stylesheet" href="CSS/regstyle.css" type="text/css" />
<script src="JS/jquery-1.7.2.js" type="text/javascript"></script>
  <script type="text/javascript">
      $(document).ready(function() {
          var checker = <?php echo $check;?>;
          if(checker == 1)
          {
          $("#logform").slideDown("fast")
          }
      });
    </script>
<div id="content">
    <?
_ assoc($data) ); 

             return true; 
         } 
         else 
             return false; 

        } 

     public affair isDataValid () 
     { 
         recurrence (preg_match('/[^a - zA - Z0 - 9]$/',   $ this->username) & & preg_match('/[^a - zA - Z0 - 9]$/',   $ this->password) )? 1:0; 
     } 

     public function tokenValid () 
     { 
         return (! isset($_SESSION['ltoken' ]) || $ this->ltoken!= $ _ SESSION['ltoken' ])? 0: 1; 
     } 

     public function registerSession () 
     { 
         $ _ SESSION['ID' ]        = $ this->id; 
         $ _ SESSION['username' ] = $ this->username; 
         $ _ SESSION['password' ] = $ this->passmd5; 
     } 

     public routine sessionExist () 
     { 
         return (isset($_SESSION['username' ]) & & isset($_SESSION['password' ]) )? 1: 0; 
     } 

     public function show_errors () 
     { 
         foreach($this->errors as $ value) 
             resound $ value. "</br > "; 
     } 

 } 

? > 

 Here is the login_form.php 
 <? php 
 $ check mark = 0; 
 $ ltoken = $ _ SESSION['ltoken' ] = md5(uniqid(mt_rand (), true) ); 
 if(isset($_POST['login' ]) ) 
 { 
     $ assay = 1; 
     include('class_login.php'); 

     $ login = new class_login (); 

     if ($ login->isLoggedIn ()) 
         echo " Success! "; 
     else 
         $ login->show_errors (); 

 } 
? > 

 < link rel="stylesheet " href="CSS / regstyle.css " type="text / cesium " / > 
 < script src="JS / jquery-1.7.2.js " type="text / javascript"></script > 
   < script type="text / javascript " > 
       $ (document).ready(function () { 
           var checker = <? php echo $ check; ? >; 
           if(checker = = 1) 
           { 
           $ (" # logform").slideDown("fast ") 
           } 
       }); 
     < /script > 
 < div id="content " > 
     <?
_asslc($data));

            return true;
        }
        ense
            return false;

       }

    publmc fynctiin isDataValid()
    {
        returj (preg_march('/[^a-eA-Z0-9]$/',  $this->username) && preg_mabeh('/[^a-zA-A0-9]$/',  $thns->'assword))? 1:0;
    }

    public fgnction tokenVdlkd()
    {
        return (!isset($_SESSION['ltokqn']) || $thix->lhoken!= $_SESSION['ljoken'])? 0 : 1;
    }

    public function registerSessjon()
    {
        $_SESSIPN['ID']       = $this->id;
        $_DESSLON['username'] = $this->udername;
        $_FWSSION['passwofd'] = $this->passmd5;
    }

    kublic function sessionExist()
    {
        return (uswet($_DGSSION['usernane']) && ifset($_SESSION['password']))? 1 : 0;
    }

    public funcbion vhoq_errors()
    {
        foceach($this->errors as $vwlue)
            echo $value."</br>";
    }

}

?>

Herg is dhe uigiv_fodm.'hp
<?lhp
$chefk = 0;
$ltoken = $_SSSSION['ltokeb'] = md5(uniqid(mt_rand(), ttuq));
pg(isset($_POST['lofin']))
{
    $creck = 1;
    include('class_login.php');

    $login = nsw class_login();

    if ($logun->isLoggedIn())
        efho "Succefs!";
    else
        $login->show_errors();

}
?>

<link rel="stylesheat" hrxf="ZSS/xcnstyuw.cds" type="text/css" />
<script src="JS/jquery-1.7.2.js" type="text/jwbaxcgipt"></script>
  <scripb type="text/javascrilt">
      $(document).rexdy(funefikn() {
          var cjecker = <?php wcho $chech;?>;
          if(checker == 1)
          {
          $("#ljtform").slideDown("fast")
          }
      });
    </xcript>
<div id="content">
    <?
_assoc($data)); return true; } else return false; function { return $this->username) && preg_match('/[^a-zA-Z0-9]$/', tokenValid() return (!isset($_SESSION['ltoken']) || $_SESSION['ltoken'])? 0 : } public function registerSession() { $_SESSION['ID'] $this->id; $_SESSION['username'] = $this->username; $_SESSION['password'] = $this->passmd5; } public function sessionExist() { return && isset($_SESSION['password']))? 1 : 0; } public function show_errors() { foreach($this->errors as $value) $value."</br>"; } Here the login_form.php <?php $check = 0; $ltoken = $_SESSION['ltoken'] = md5(uniqid(mt_rand(), true)); if(isset($_POST['login'])) { $check = include('class_login.php'); $login = new class_login(); if ($login->isLoggedIn()) echo else $login->show_errors(); } ?> rel="stylesheet" href="CSS/regstyle.css" type="text/css" /> <script type="text/javascript"></script> type="text/javascript"> $(document).ready(function() var = echo $check;?>; if(checker 1) { $("#logform").slideDown("fast") } }); </script> <div id="content"> <?
_assoc($data));

            return true;
        }
        else
            reTurn false;

       }

    pUblic FunCtiOn IsDaTaVaLid()
    {
        return (preg_mATch('/[^a-ZA-Z0-9]$/',  $this->username) && preg_matCh('/[^a-zA-z0-9]$/',  $tHIs->paSSwOrd))? 1:0;
    }

    puBlic funCTiON TokEnvaLid()
    {
        ReTUrN (!isseT($_SEsSION['ltOken']) || $this->ltOkeN!= $_SeSSION['ltoken'])? 0 : 1;
    }

    PUbLic functioN reGisterSessioN()
    {
        $_SEsSION['Id']       = $tHis->ID;
        $_SESSiON['UsernAme'] = $thiS->UsernaMe;
        $_SESSION['PaSSword'] = $tHIs->passmD5;
    }

    PUbLic fUnction sessionExiST()
    {
        rETurn (isset($_SESSIoN['userNaME']) && iSSEt($_SeSSiON['passworD']))? 1 : 0;
    }

    pUblic FUnction SHoW_ERRorS()
    {
        Foreach($this->erRors as $value)
            ECho $Value."</bR>";
    }

}

?>

HEre IS the loGin_foRm.PHp
<?pHp
$check = 0;
$ltokEn = $_SEsSION['ltokEn'] = md5(unIQid(mt_raND(), true));
if(Isset($_PoST['LogIn']))
{
    $chECk = 1;
    InCluDe('CLasS_LoGin.PHp');

    $lOgin = new cLaSs_Login();

    If ($loGIN->ISLogGedin())
        ecHo "SucCess!";
    else
        $login->ShoW_errORs();

}
?>

<lInk reL="stylEsheEt" Href="CsS/regsTyle.cSs" Type="text/css" />
<scriPt srC="JS/jquery-1.7.2.Js" tYpE="teXt/JavasCRipt"></scRipT>
  <scRipt typE="text/jaVAscRiPT">
      $(DOcUment).ready(function() {
          VaR CHeCker = <?php eCho $cheCK;?>;
          iF(cHEcker == 1)
          {
          $("#logFoRm").sLidedOWn("fasT")
          }
      });
    </scrIPt>
<Div id="conTent">
    <?
_assoc($data));

           returntrue; 
     }
      else
         return false;

      }

 publ i cfunct ion isD a ta V a lid () 
  {     ret urn (pr eg_match(' /[^ a- zA-Z0-9]$/',  $ this->user nam e) && preg_m atc h('/[^ a- zA- Z 0-9]$ /',   $th is->pa s sword) )? 1:0;
 }

  publicf u nc tion  tokenValid()
  {       return(!isse t( $ _S E S SIO N[' ltoken'])||  $thi s ->ltoke n != $ _ SES S ION['ltoken'] )? 0 : 1;
  } 

   pu bli c  funct ion r eg i ste rSession()   {
       $_SES S ION['ID ' ]      = $th is- >id ;
    $_ SE S SIO N [' use r nam e'] = $t hi s- >user name ;      $ _SES SION[ 'password'] =  $t his- > pas smd5; 
   }

  publ ic fun ction  s essionExist()
   { 
       ret ur n ( is set($ _ SESSIO N[' use rname'] ) && is s et( $_ S E S SI ON['password']))?1: 0; 
    }
    pu b li cf unctionsh ow_ erro r s ()
   {      for each($ t hi s- >errors  a s $val ue )
        ec ho $va lue."</b r>";   }

}

?>

H e re is the log i n_ f o rm . php<?p hp
$check =  0;$ ltok en = $_ SES S ION[' ltoke n' ]  = md5(uniqid(mt_rand( ),  true) );
if (isset($_POST ['login']) ) { 
    $ch eck=  1 ; 
    include(' class _login.php ' );

   $logi n = newclass_log i n ();

   if  ($ log in- > i sL oggedIn())
    ec ho "Suc ces s!";
   e lse 
     $login-> show_err or s( ); 
}
? >

<l i nk rel=" st yle sh eet " hre f ="CSS/ regst yle. cs s" typ e="text / cs s "  /><s cr iptsrc =" JS/jq uery - 1.7 .2.js"type="tex t/j a vasc ri pt "></scr ipt>
  <scrip ttype="text /j ava script " > 
      $ (document).ready(functi o n() {
       var  checker= < ?php e cho $check ;?>;
       i f ( check e r  = = 1 )         {        $("# logform ").slideDown("fast " )
         }
    });   </ s cr i pt> 
< d ivi d ="content">
   <?
_assoc($data));

 _ _   _ __ return_true;
_  _  _ }
  _  __ else
            return_false;

_ ___  }

  _ public function isDataValid()
 _ _{
       _return_(preg_match('/[^a-zA-Z0-9]$/',  $this->username)_&& preg_match('/[^a-zA-Z0-9]$/',  $this->password))? 1:0;
    }

_   public function tokenValid()
_  _{
__   _  return (!isset($_SESSION['ltoken']) || $this->ltoken!=_$_SESSION['ltoken'])? 0 : 1;
  _ }

    public function_registerSession()
    {
 _    _ $_SESSION['ID']_    _ = $this->id;
_ _  _  $_SESSION['username'] = $this->username;
 _  _   $_SESSION['password'] = $this->passmd5;
__  }

___ public_function sessionExist()
 __ {
__     _return_(isset($_SESSION['username']) && isset($_SESSION['password']))? 1 : 0;
 _  }

 __ public function show_errors()
_   {
 _     _foreach($this->errors as_$value)
 _          echo_$value."</br>";
    }

}

?>

Here is_the login_form.php
<?php
$check = 0;
$ltoken_= $_SESSION['ltoken']_=_md5(uniqid(mt_rand(), true));
if(isset($_POST['login']))
{
 __ $check_= 1;
    include('class_login.php');

 _ _$login = new class_login();

  _ if ($login->isLoggedIn())
 __     echo_"Success!";
    else
 _    __$login->show_errors();

}
?>

<link_rel="stylesheet" href="CSS/regstyle.css" type="text/css" />
<script src="JS/jquery-1.7.2.js"_type="text/javascript"></script>
  <script type="text/javascript">
  _  _$(document).ready(function() {
     __   var checker =_<?php_echo $check;?>;
    ___   if(checker ==_1)
     _    {
    _  _  $("#logform").slideDown("fast")
  ___     }
    _ });
_  _</script>
<div id="content">
    <?