Possible Duplicate:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result
I have a PHP script where the User can change his account settings. But there is a problem because I have a mistake which I can't find. Can you help me please.
Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in /Applications/XAMPP/xamppfiles/htdocs/tutorials/findFriends/account_settings.php on line 69
<?
include ("inc/incfiles/header.inc.php");
if ($user) {
}
else
{
 die ("You must be logged in to view this page!");
}
?>
<?
$senddata = $_POST['senddata'];
//Password variables
$old_password = strip_tags($_POST['oldpassword']);
$new_password = strip_tags($_POST['newpassword']);
$repeat_password = strip_tags($_POST['newpassword2']);
if ($senddata) {
//If the form has been submitted ...
$password_query = mysql_query("SELECT * FROM users WHERE username='$user'");
while ($row = mysql_fetch_assoc($password_query)) {
    $db_password = $row['password'];
    //md5 the old password before we check if it matches
    $old_password_md5 = md5($old_password);
    //Check whether old password equals $db_password
    if ($old_password_md5 == $db_password) {
     //Continue Changing the users password ...
     //Check whether the 2 new passwords match
     if ($new_password == $repeat_password) {
        if (strlen($new_password) <= 4) {
         echo "Sorry! But your password must be more than 4 character long!";
        }
        else
        {
        //md5 the new password before we add it to the database
        $new_password_md5 = md5($new_password);
       //Great! Update the users passwords!
       $password_update_query = mysql_query("UPDATE users SET password='$new_password_md5' WHERE username='$user'");
       echo "Success! Your password has been updated!";
        }
     }
     else
     {
      echo "Your two new passwords don't match!";
     }
    }
    else
    {
     echo "The old password is incorrect!";
    }
}
 }
else
{
 echo "";
}
$updateinfo = $_POST['updateinfo'];
//First Name, Last Name and About the user query
$get_info = mysql_query("SELECT first_name, last_name, bio FROM users WHERE username='$user'");
$get_row = mysql_fetch_assoc($get_info);
$db_firstname = $get_row['first_name'];
$db_last_name = $get_row['last_name'];
$db_bio = $get_row['bio'];
//Submit what the user types into the database
if ($updateinfo) {
 $firstname = strip_tags($_POST['fname']);
 $lastname = strip_tags($_POST['lname']);
 $bio = $_POST['bio'];
 if (strlen($firstname) < 3) {
echo "Your first name must be 3 more more characters long.";
 }
 else
 if (strlen($lastname) < 5) {
echo "Your last name must be 5 more more characters long.";
}
else
{
//Submit the form to the database
$info_submit_query = mysql_query("UPDATE users SET first_name='$firstname', last_name='$lastname', bio='$bio' WHERE username='$user'");
echo "Your profile info has been updated!";
header("Location: $user");
}
}
else
{
 //Do nothing
}
?>
<h2>Edit your Account Settings below</h2>
<hr />
<form action="account_settings.php" method="post">
<p>CHANGE YOUR PASSWORD:</p> <br />
Your Old Password: <input type="text" name="oldpassword" id="oldpassword" size="40"><br />
Your New Password: <input type="text" name="newpassword" id="newpassword" size="40"><br />
Repeat Password  : <input type="text" name="newpassword2" id="newpassword2" size="40"><br />
<input type="submit" name="senddata" id="senddata" value="Update Information">
</form>
<hr />
<form action="account_settings.php" method="post">
<p>UPDATE YOUR PROFILE INFO:</p> <br />
First Name: <input type="text" name="fname" id="fname" size="40" value="<? echo $db_firstname; ?>"><br />
Last Name: <input type="text" name="lname" id="lname" size="40" value="<? echo $db_last_name; ?>"><br />
About You: <textarea name="bio" id="bio" rows="7" cols="40"><? echo $db_bio; ?></textarea>
<hr />
<input type="submit" name="updateinfo" id="updateinfo" value="Update Information">
</form>
<br />
<br />
And if I want to change the first or last name there is this error:
Warning: Cannot modify header information - headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/tutorials/findFriends/inc/incfiles/header.inc.php:72) in /Applications/XAMPP/xamppfiles/htdocs/tutorials/findFriends/account_settings.php on line 93
Here is the header.inc.php:
<?
include ("inc/scripts/mysql_connect.inc.php");
session_start();
if (isset($_SESSION['user_login'])) {
$user = $_SESSION["user_login"];
}
else {
$user = "";
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
        <meta charset="utf-8">
        <link rel="stylesheet" href="css/reset.css" media="screen">
        <link rel="stylesheet" href="css/master.css" media="screen">
        <link rel="stylesheet" href="css/blue.css" media="screen">
    <link rel="stylesheet" href="css/main.css" media="screen">
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
        <script src="js/jquery.color.js"></script>
        <script src="js/script.js"></script>
    <script src="js/placeholder-js.js" type="text/javascript"></script>
    <script src="js/main.js" type="text/javascript"></script>
        <title>findFriends</title>
</head>
<body>
                <div class="mashmenu">
                        <div id="menuWrapper">
                        <div class="fnav">
                                <a href="#" class="flink" >findFriends+ </a>
                                <div class="allContent">
                                        <div class="snav" >
                                                <a href="#" class="slink" >About findFriends</a>
                                                <div class="insideContent">
                                                        <span class="featured" >What is it?<br />
                            findFriends is an open source social network, created for the sinimma YouTube tutorial
                            series. All code is explained and completely free to download and use.<a href="http://www.youtube.com/sinimma">Visit our YouTube
                            channel ...</a>
                            </span>
                                                </div><!-- end insideContent -->
                                        </div><!-- end snav -->
                                        <div class="snav" >
                                                <a href="#" class="slink" >Open Source?</a>
                                                <div class="insideContent">
                                                        <span class="featured" >All code is open source and freely availible,</span>
                                                        because this means that anyone can download and improve the source code whatever
                            way they want without permission. <br />You may use this source code in any way to do anything.
                            All we <br />ask is that you keep the link at the bottom of the page, as a way of saying thanks for
                            all of the work we have done. :)
                                                </div><!-- end insideContent -->
                                        </div><!-- end snav -->
                                        <div class="snav" >
                                                <a href="http://www.youtube.com/sinimma" class="slink" >Youtube Channel</a>
                                                <div class="insideContent">
                                                        <span class="featured" ></span>
                                        </div><!-- end snav -->
                    </div>
                                </div><!-- end allContent -->
                        </div><!-- end fnav -->
                        <?
                        if (isset($_SESSION["user_login"])) {
                        echo '
                        <div class="fnav">
                                <a href="' . $user . '" class="flink" >' . $user . '\'s Profile</a>
                        </div><!-- end fnav -->
                        <div class="fnav">
                                <a href="account_settings.php" class="flink" >Account Settings</a>
                        </div><!-- end fnav -->
                        <div class="fnav">
                                <a href="logout.php" class="flink" >Logout</a>
                        </div><!-- end fnav -->
                        ';
                        }
                        else
                        {
                                echo '
                                <div class="fnav">
                                <a href="index.php" class="flink" >Sign Up+ </a>
                        </div><!-- end fnav -->
            <div class="fnav">
                                <a href="index.php" class="flink" >Login+ </a>
                        </div><!-- end fnav -->
                                ';
                        }
                        ?>
                        <div class="feat">
                                <form id="searchForm">
                <fieldset>
                    <div class="input">
                        <input type="text" class="Search" id="s" value="Search findFriends ..." />
                    </div>
                    <input type="submit" id="searchSubmit" value="" />
                </fieldset>
            </form>
                        </div><!-- end fnav feat -->
          </div>
                </div><!--end mashmenu -->
        <div id="wrapper">
<br />
<br />
<br />
<br />
 
     
     
    