PHP login and Set cookie code

Provide a can save the user login information to do, here is a simple PHP login and set the cookie code Oh, very simple.

if (! $c _log) {
$title. = ' landing ';
if ($_server[' Request_method ']== ' POST ') {
if (isset ($_post[' username ')) && trim ($_post[' username '])!= ' && isset ($_post[' password ']) & & Trim ($_post[' password '])!= ') {
$username =trim ($_post[' username '));
$password =enc_p (Trim ($_post[' password '));
$q _author=sprintf (' select * from%s where username=%s and password=%s ', $dbprefix. ' member ', SqlString ($username, ' text ') , SqlString ($password, ' text '));
$author =mysql_query ($q _author) or Die (");
$r _author=mysql_fetch_assoc ($author);
if (mysql_num_rows ($author) >0) {
if ($r _author[' status ']==0 | | $r _main[' veri ']>0) {
$uSQL =sprintf (' update%s set visit=visit+1, visitdate=%s where id=%s ', $dbprefix. ' member ', Time (), $r _author[' id ');
$result =mysql_query ($uSQL) or Die (');
Session_unset ();
Session_Start ();
$_session[' palu_id ']= $r _author[' id '];
if (Isset ($_post[' Remember ')) && $_post[' Remember ']== ' 1 ') {
Setcookie (' Palu_u ', $username, Time () +86400*30);
Setcookie (' palu_p ', $password, Time () +86400*30);
}else{
Setcookie (' Palu_u ', ', ', Time ());
Setcookie (' palu_p ', ', ', Time ());
}
}else{
$e = 1;
}
}else{
$e = 2;
}
Mysql_free_result ($author);
}
if (Isset ($_get[' m ')) $u []= ' m= '. $_get[' m '];
if (isset ($_get[' t ')) $u []= ' t= '. $_get[' t '];
if (Isset ($_get[' page ')) $u []= ' page= '. $_get[' page '];
if (Isset ($e)) $u []= ' e= '. $e;
$topinfo. = ' <script type= ' text/javascript ' >location.href= '. (Isset ($u)? Join (' & ', $u): './'). '; </script> ';
}else{
if (Isset ($_get[' e ')) {
if ($_get[' E ']==2) {
$msg = ' username/password Error! ';
}elseif ($_get[' e ']==3) {
$msg = ' Registration successful! Please '. ($r _main[' Veri ']>0?) Login ': ' Wait for admin audit '. ';
}else{
$msg = ' Your account has not yet passed the audit, please try again later. ';
}
}
   $content. = ' <div class= ' tcontent ' > '. (Isset ($msg)? ' <div class= "Msg_v" > '. $msg. ' </div> ': '). ' <div class= "title" > Login </div><div class= "lcontent" ><form method= "post" action= "onsubmit=" return Chklog (); " ><div class= "formline" ><label for= "FormName" > Username: </label><input name= "username" FormName "size=" maxlength= "/></div><div class=" formline "><label for=" FORMPW "> Password: </ Label><input name= "Password" id= "FORMPW" "size=" maxlength= "type=" password class= "Formline" ><label></label><input name= "Remember" value= "1" type= "checkbox" title= "to ensure information security , please do not choose this item in the Internet Café or public computer room! If you want to cancel this option in the future, simply click "Exit Login". "/> Remember me </div><div class=" formline "><input type=" Submit "value=" Landing "id=" Formsubmit "class=" button "/ > <input type= "reset" value= "Cancel" class= button "/><br/>". ($r _main[' Openreg ']==0?) <a href= "? M=reg" > Join the Class </a> | ':'').' &Lt;a href= "? m=lostpw" > Forget password </a></div></form></div></div> ';
}
}else{
$topinfo. = ' <script type= ' text/javascript ' >location.href= './';</script> ';
}
?>