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Posted by Jerry Kita on 01/06/05 04:37
I do exactly the same thing on my website. I use PHP's Session handling
to determine if a user is actually logged on.
You can see that I check a variable called $validlogon which I set to
either YES or NO at the beginning of the script
<?php
if ($validlogon == "NO") {
print "<p class=\"hnavbar\">Salkehatchie Members Login Here:<br>\n";
print "<form action=\"Salkehatchie_LoginScript.php\" method=\"POST\">\n";
print "<p class=\"login\"><small>USER ID:</small><br>\n";
print "<input type=\"text\" name=\"userid\"><br><br>\n";
print "<small>PASSWORD:</small><br>\n";
print "<input type=\"password\" name=\"password\"><br><br>\n";
print "<input type=\"submit\" value=\"Enter\"></p>\n";
print "</form>\n";
}
?>
Near the beginning of my script I check for the existence of a valid session
<?php
if (isset($_SESSION[userid])) {
$validlogon = "YES";
} else {
$validlogon = "NO";
}
?>
Setting the $validlogon variable allows me to do a number of useful
things. For example, there are certain parts of the webpage that I
reveal to logged in users. Checking $validlogon allows me to decide
dynamically what to render to the browser. In the following I display
a message showing the user as being logged in and give them a link that
logs them out.
if ($validlogon == "YES") {
print "<table style=\"width: 100%\";>\n";
print "<tbody>\n";
print "<tr>\n";
print "<td width=\"50%\"><p class=\"login\"><small><b>YOU ARE LOGGED
IN AS: $_SESSION[userid]</b></small></p></td>\n";
print "<td width=\"50%\"><p class=\"login\"><small><b>CLICK <a
href=\"LogoutScript.php\"> here</a> TO LOGOUT</b></small></p></td>\n";
print "</tr>\n";
print "</table>\n";
}
Hope this is helpful
Jerry Kita
JHollis wrote:
> I had this code working the way i wanted it to (as far as correct
> username and password allowing successful login)...but what i want to
> happen now is when a user successfully logs it it will make the login
> form disappear and just say successfully logged in or welcome user and a
> link below it so they can log off and make the form re-appear. Below is
> the code that i have where i tried to get it to disappear on successful
> login, but it stays disappeared all the time. Can someone please point
> out what im doing wrong. I have tried everything i can think of...and
> nothing works. Im a PHP newbie...so im sure some of you might get a
> laugh out of this...if it is real easy.
>
> <---snippet
>
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> <html>
> <head>
> <link href="style.css" rel="stylesheet" type="text/css" />
> </head>
> <body>
> <div id="container">
> <div id="top">
> <h1>header</h1>
>
> </div>
> <div id="leftnav">
> <p>
>
> <?php
>
> $username=$_POST['username'];
> $password=$_POST['password'];
> $db="user";
> $server="localhost";
> $db_username="root";
> $db_password="*******";
>
> $connect = mysql_connect($server,$db_username,$db_password);
> if (!$connect) {
> die ("could not connect to database");
> }
> $select = mysql_select_db($db,$connect);
> if (!$select) {
> die ("could not select database $db");
> }
> /*username='$username'";*/
> $sql = "SELECT * FROM passwords, user_info where id=PID and
> username='$username'";
> $result = mysql_query($sql);
> /*$num_rows = mysql_num_rows($result);*/
> while ($user = mysql_fetch_array($result))
> {
> $id = $user['id'];
> $username2 = $user['username'];
> $password2 = $user['password'];
> $firstname = $user['firstname'];
> $email = $user['email_address'];
>
>
> IF ($username=="$username2" && $password=="$password2")
> {
> echo("\"Welcome, <b>$firstname</b>\"");?><br><?
> echo ("\"Your email address is <b>$email<b>\"");?></td><tr>
> <a
> href="<?$_SERVER['PHP_SELF']?>?username=""&?password=""">Logoff</a><?
> break;
> }
> else
> {
> ?>
> <FORM action="<?$_SERVER['PHP_SELF']?>" method="post">
> <INPUT type="hidden" name="id">
> <table>
> <td><b>*</b>Username:</td> <td><INPUT class="input"
> size="8" type="text" name="username" value="<?echo $username?>"></td><tr>
> <td><b>*</b>Password:</td> <td><INPUT class="input"
> size="8" type="password" name="password"></td><tr>
> <td class="xsmall"><b>* Case Sensitive</b></td>
> <td><INPUT type="submit" value="Login"></td><tr>
> <td>  </td>
> </table>
> </FORM>
> <?
>
> break;
> }
>
> }
> //IF ($username != $username2 || $password != $password2) {//
>
>
>
> ?><br>
> <?
> if ($username == "" && $password == "") {
> echo ("Please type in a Username and Password");}
>
> if ($username != "" && $password == "") {
> echo ("Please type in a password");}
>
> if ($username == "" && $password != "") {
> echo ("Please type in a username and password");}
>
> ?>
>
>
> </p>
> </div>
> <?if (($username2==$username && $password2==$password) &&
> ($username2!="" || $password2!="")){?>
> <div id="rightnav" class="box">
> <p>
> </p>
> </div>
> <?}?>
> <div id="content">
> <h2>Subheading</h2>
> <p>
> </p>
> <p>
> </p>
> </div>
> <div id="footer">
> <p>
> Today is
> <?php
> echo( date("F dS Y."));
> ?>
> </p>
> </div>
> </div>
> </body>
> </html>
> ---->snippet
--
Jerry Kita
http://www.salkehatchiehuntersville.com
email: jskita@attglobal.net
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