So I fixed it for me. This is still the single page variation of my script, and it works for me on both IE and Firefox. I split it into multiple pages, but that didn't work, so here is the single page code.
So this is the multiple user variation, an example of which is here:
http://www.actonhighschool.ca/7/Boards.php
First you'll need a table to keep track of users:
<?php
mysql_connect ("localhost", "username", "password") or die ('I cannot connect to the database because: ' . mysql_error());
mysql_select_db ("database name") or die ('I cannot connect to the database because: ' . mysql_error());
$sql = "CREATE TABLE users
(
number int NOT NULL AUTO_INCREMENT,
PRIMARY KEY(number),
name varchar(50),
password varchar(50),
avatar varchar(50),
signature varchar(1000)
)";
mysql_query($sql) or die ('I cannot create table because: ' . mysql_error());
echo "table created";
?>
Once you have that in you make a registration page (call it Register.php):
mysql_connect ("localhost", "username", "password") or die ('I cannot connect to the database because: ' . mysql_error());
mysql_select_db ("database name") or die ('I cannot connect to the database because: ' . mysql_error());
/*Get results from users table and then set initial variables*/
$result = mysql_query("SELECT * FROM users");
$userexist="0";
$usercreated="0";
/*Arrange table data into arrays*/
while($row = mysql_fetch_array($result)) {
$number[]= $row['number'];
$l_name[]= $row['name'];
}
/*Run a loop to see if the username entered exists or not*/
for($j = 0; $j < sizeof($number); $j++) {
if ($_POST[txtUsername] == $l_name[$j]) {
$userexist="1";
}
}
/*Check to see if a username and password has been entered and if so
Check to see if the entered passwords match and if they do
Check to see if the user already exists and if not
Register the new username*/
if($mode=="register") {
if($_POST[txtUsername] == "" || $_POST[txtPassword] == "") {
Echo "<p>Please enter a username and/or a password</p>";
}
elseif($_POST[txtPassword]==$_POST[txtPasswordc]) {
if($userexist != "1") {
mysql_query("INSERT INTO users (name, password)
VALUES ('$_POST[txtUsername]', md5('$_POST[txtPassword]'))")
or die ('I cannot add user: ' . mysql_error());
echo "<p>User Added</p>";
echo "<p><a href='Boards.php'>Return To The Boards</a></p>";
$usercreated="1"; }
else {
echo "This username already exists, please enter another";
}
}
else {
echo "Your password did not match, please type it in again";
}
}
/*If a new user hasn't signed up then show a form through which they can enter a username, password and confirmation*/
if($usercreated == "0"){
echo "
<p>
<strong>Register</strong>
<form name='form' method='post' action=\"$PHP_SELF?ID=&mode=register\">
<p><label for='txtUsername'>Username:</label>
<br /><input type='text' title='Enter your Username' name='txtUsername' /></p>
<p><label for='txtpassword'>Password:</label>
<br /><input type='password' title='Enter your password' name='txtPassword' /></p>
<p><label for='txtpasswordc'>Confirm Your Password:</label>
<br /><input type='password' title='Confirm your password' name='txtPasswordc' /></p>
<p><input type='submit' name='Submit' value='Register' /></p>
</form>
</p>";
}
And finally the actual boards page (call it Boards.php):
<?php
session_start();
mysql_connect ("localhost", "username", "password") or die ('I cannot connect to the database because: ' . mysql_error());
mysql_select_db ("database name") or die ('I cannot connect to the database because: ' . mysql_error());
/*Login Variable to check if user logged in. Default is zero*/
$logged="0";
/*Get the current time and date*/
$dateadd=date("j of F Y, \a\\t g.i a", time());
/*Get user name as variable*/
$nameadd=$_SESSION['user'];
/*Add a post if the add post form has been submitted*/
if($mode=="add") {
mysql_query("INSERT INTO messageboards (name, date, title, message)
VALUES ('$nameadd', '$dateadd', '$_POST[titleadd]', '<pre>$_POST[messageadd]</pre>')")
or die ('I cannot add message because: ' . mysql_error());
}
/*Delete a post if the remove button has been clicked*/
if($mode=="remove") {
mysql_query("DELETE FROM messageboards WHERE number = $ID");
}
/*End the users session*/
if($mode=="logout") {
unset($_SESSION['user']);
}
/*Get all the user names and passwords*/
$result = mysql_query("SELECT * FROM users");
while($row = mysql_fetch_array($result)) {
$number[]= $row['number'];
$l_name[]= $row['name'];
$password[]= $row['password'];
}
/*If the login form has been submitted, check the database user names and passwords against the entered ones. Done with encryption.*/
if($mode=="login") {
$enteredpw=md5($_POST['txtPassword']);
for($i = 0; $i < sizeof($number); $i++) {
if ($_POST['txtUsername'] == $l_name[$i] && $enteredpw == $password[$i]) {
$logged = "1";
}
if ($_SESSION['user'] == $l_name[$i]) {
$logged = "2";
}
}
if ($logged == "1") {
session_start();
$_SESSION['user'] = $_POST['txtUsername'];
$nameadd=$_SESSION['user'];
}
}
/*Check to see if a session exists, and if so set logged to be 2*/
for($j = 0; $j < sizeof($number); $j++) {
if ($_SESSION['user'] == $l_name[$j]) {
$logged = "2";
$nameadd=$_SESSION['user'];
}
}
/*echo in the html doctype and head*/
echo "
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=iso-8859-1' />
<title>The Boards</title>
</head>
<body>
<font face='Times New Roman' color='#FFFFCC'>";
include("header.inc.php");
/*If the user is logged in print out the table of messages with the remove button. Also print out a form for adding messages.*/
/*If no user if logged in then print the table of messages without a remove button, and print a login form.*/
$i="0";
if ($logged == "2") {
print "<p>". $_SESSION['user'] ." Is logged in </p>";
echo "<a href=\"$PHP_SELF?ID=$number[$i]&mode=logout\">Logout</a><br /><br />";
$result = mysql_query("SELECT * FROM messageboards ORDER BY number DESC");
while($row = mysql_fetch_array($result)) {
$numbers[]= $row['number'];
$n_name[]= $row['name'];
$date[]= $row['date'];
$title[]= $row['title'];
$message[]= $row['message']; }
echo "<table border='1' width='500px'>";
for ($n = 0; $n < sizeof($n_name); $n++) {
echo "<tr><td>" . $n_name[$n] . "</td></tr>";
echo "<tr><td>" . $date[$n] . "</td></tr>";
echo "<tr><td><strong>" . $title[$n] . "</strong></td></tr>";
echo "<tr><td>" . $message[$n] . "</td></tr>";
if($nameadd == $n_name[$n]) {
echo "<tr><td><a href=\"$PHP_SELF?ID=$numbers[$n]&mode=remove\">Delete Message</a></td></tr>";
}
echo "<tr><td><br /><br /></td></tr>"; }
echo "</table>";
echo "
<form method='POST' action=\"$PHP_SELF?mode=add\">
<p><strong>Message Title: </strong><br /><input type='text' size='50' name='titleadd' /><br />
<strong>Message: </strong><br /><textarea cols='70' rows='20' name='messageadd' wrap='virtual'></textarea><br />
<input type='submit' value='Add Message' /></p><br />
</form>";
}
else {
$result = mysql_query("SELECT * FROM messageboards ORDER BY number DESC");
while($row = mysql_fetch_array($result)) {
$number[]= $row['number'];
$n_name[]= $row['name'];
$date[]= $row['date'];
$title[]= $row['title'];
$message[]= $row['message']; }
echo "<table border='1' width='500px'>";
for ($m = 0; $m < sizeof($n_name); $m++) {
echo "<tr><td>" . $n_name[$m] . "</td></tr>";
echo "<tr><td>" . $date[$m] . "</td></tr>";
echo "<tr><td><strong>" . $title[$m] . "</strong></td></tr>";
echo "<tr><td>" . $message[$m] . "</td></tr>";
echo "<tr><td><br /><br /></td></tr>"; }
echo "</table>";
echo "
<p>
<strong>Login</strong>
<form name='form' method='post' action=\"$PHP_SELF?ID=&mode=login\">
<p><label for='txtUsername'>Username:</label>
<br /><input type='text' title='Enter your Username' name='txtUsername' /></p>
<p><label for='txtPassword'>Password:</label>
<br /><input type='password' title='Enter your password' name='txtPassword' /></p>
<p><input type='submit' name='Submit' value='Login' /></p>
</form>
</p>
<p>Don't have a login, <a href='Register.php'>Register</a></p>";
}
echo "</font>";
?>
</body>
</html>
This is actually my page which includes a header file, as well as some fonts. So if you want to use this code as is then you'll need to make a header.inc.php, otherwise remove the include line and change the font tag to whatever font you want. Right now the font is off white, so if you run this and see nothing, just check the font.
Anyway, this is the exact code from my working page so it should work. If you have any problems, or questions let me know.
Cheers