Programming Buddies,

Here's my latest script. It is a member reg-login script.
It registers you and gets you to activate your account confirming your email and then auto logs you into your account. It uses cookies to remember your user details. It was working fine until I added the feature for you to make posts to your friends or the public.
I get error:

PHP Parse error: syntax error, unexpected '"', expecting '-' or identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in /home/sn/public_html/sn/home.php on line 168

On many lines, I changed from:

$query = "SELECT * FROM users WHERE Username = '".$user."'";

to:

$query = "SELECT * FROM users WHERE Username = '$user';

but no luck in getting rid of the error. You will see line 168 doesn't have any ".
I use notepad++. Error mssg seems irrelevant.

And so, looking at the error and my script, what do you think the problem is ? Best to c
heck my code on your wamp/xampp to really understand the problem.

Thank You!

PPS - Script in next post.

register.php

[php]

<!DOCTYPE html>
<html>
<head>
<title>Signup Page</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class = "container">
<center><h2>Signup Form</h2></center>
<form method="post" action="">
<div class="form-group">
<center><label for="username">Username:</label>
<input type="text" class="form-control" id="user" placeholder="Enter a unique Username" name="member_registration_username"></center>
</div>
<div class="form-group">
<center><label for="password">Password:</label>
<input type="password" class="form-control" id="pwd" placeholder="Enter new Password" name="member_registration_password"></center>
</div>
<div class="form-group">
<center><label for="password">Repeat Password:</label>
<input type="password" class="form-control" id="member_registration_repeat_pwd" placeholder="Repeat new Password" name="member_registration_password_confirmation"></center>
</div>
<div class="form-group">
<center><label for="forename">First Name:</label>
<input type="text" class="form-control" id="member_registration_first_name" placeholder="Enter your First Name" name="member_registration_forename"></center>
</div>
<div class="form-group">
<center><label for="surname">Surname:</label>
<input type="text" class="form-control" id="member_registration_last_name" placeholder="Enter your Surname" name="member_registration_surname"></center>
</div>
<div class="form-group">
<center><label for="email">Email:</label>
<input type="email" class="form-control" id="member_registration_email" placeholder="Enter your Email" name="member_registration_email"></center>
</div>
<div class="form-group">
<center><label for="email">Repeat Email:</label>
<input type="email" class="form-control" id="member_registration_repeat_email" placeholder="Repeat your Email" name="member_registration_email_confirmation"></center>
</div>
<center><button type="submit" class="btn btn-default" name="submit">Register!</button></center>
<center><font color="red" size="3"><b>Already have an account ?</b><br><a href="login.php">Login here!</a></font></center>
</form>
</div>
</body>
</html>
<?php
require "conn.php";
if (isset($_POST['submit']))
{
if(!empty($_POST["member_registration_username"]) && !empty($_POST["member_registration_password"])&& !empty($_POST["member_registration_password_confirmation"])&& !empty($_POST["member_registration_email"])&& !empty($_POST["member_registration_email_confirmation"])&& !empty($_POST["member_registration_forename"])&& !empty($_POST["member_registration_surname"]))
{
$member_registration_account_activation = 0;
$member_registration_random_numbers = random_int(0, 9999999999);

$member_registration_username = trim($_POST["member_registration_username"]);
$member_registration_forename = trim($_POST["member_registration_forename"]);
$member_registration_surname = trim($_POST["member_registration_surname"]);
$member_registration_password = trim($_POST["member_registration_password"]);
$member_registration_password_confirmation = trim($_POST["member_registration_password_confirmation"]);
$member_registration_email = trim($_POST["member_registration_email"]);
$member_registration_email_confirmation = trim($_POST["member_registration_email_confirmation"]);
$member_registration_account_activation_code = trim("$member_registration_random_numbers");

$member_registration_username = mysqli_real_escape_string($conn,$_POST["member_registration_username"]);
$member_registration_forename = mysqli_real_escape_string($conn,$_POST["member_registration_forename"]);
$member_registration_surname = mysqli_real_escape_string($conn,$_POST["member_registration_surname"]);
$member_registration_password = mysqli_real_escape_string($conn,$_POST["member_registration_password"]);
$member_registration_password_confirmation = mysqli_real_escape_string($conn,$_POST["member_registration_password_confirmation"]);
$member_registration_email = mysqli_real_escape_string($conn,$_POST["member_registration_email"]);
$member_registration_email_confirmation = mysqli_real_escape_string($conn,$_POST["member_registration_email_confirmation"]);
$member_registration_account_activation_code = mysqli_real_escape_string($conn,$member_registrati on_account_activation_code);

if($member_registration_email != $member_registration_email_confirmation)
{
echo "<center>Your email inputs do not match! Try inputting again and then re-submit.</center>";
$conn->close();
exit();
}
else
{
}
if($member_registration_password != $member_registration_password_confirmation)
{
echo "<center>Your password inputs do not match! Try inputting again and then re-submit.</center>";
$conn->close();
exit();
}
else
{
}

$sql_check_username_in_pending_users = "SELECT * FROM pending_users WHERE Username='".$member_registration_username."'";
$result_username_in_pending_users = mysqli_query($conn,$sql_check_username_in_pending_ users);
if(mysqli_num_rows($result_username_in_pending_use rs)>0)
{
echo "<script>alert('That Username $member_registration_username is pending registration!')</script>";
exit();
}

$sql_check_username_in_users = "SELECT * FROM users WHERE Username='".$member_registration_username."'";
$result_username_in_users = mysqli_query($conn,$sql_check_username_in_users);
if(mysqli_num_rows($result_username_in_users)>0)
{
echo "<script>alert('That Username $member_registration_username is already registered!')</script>";
exit();
}

$sql_check_email_in_pending_users = "SELECT * FROM pending_users WHERE Email='".$member_registration_email."'";
$result_email_in_pending_users = mysqli_query($conn,$sql_check_email_in_pending_use rs);
if(mysqli_num_rows($result_email_in_pending_users) >0)
{
echo "<script>alert('That Email $member_registration_email is pending registration!')</script>";
exit();
}

$sql_check_email_in_users = "SELECT * FROM users WHERE Email='".$member_registration_email."'";
$result_email_in_users = mysqli_query($conn,$sql_check_email_in_users);
if(mysqli_num_rows($result_email_in_users)>0)
{
echo "<script>alert('That Email $member_registration_email is already registered!')</script>";
exit();
}

$sql = "INSERT INTO pending_users(Username,Password,Email,Forename,Sur name,Account_Activation_Code,Account_Activation) VALUES('".$member_registration_username."','".$mem ber_registration_password."','".$member_registrati on_email."','".$member_registration_forename."','" .$member_registration_surname."','".$member_regist ration_account_activation_code."','".$member_regis tration_account_activation."')";
if($conn->query($sql)===TRUE)
{
echo "Data insertion into table success!";
}
else
{
echo "Data insertion into table failure!";
$conn->close();
exit();
}

$to = "$member_registration_email";
$subject = "Account Activation!";
$body = "$member_registration_forename $member_registration_surname,\n\n You need to click the following link to confirm your email address and activate your account.\n\n\
http://www.yourdomain.com/activate_account.php?email=$member_registration_em ail&&member_registration_account_activation_code=$ member_registration_account_activation_code";
$from = "YOUR EMAIL GO HERE";
$message = "from: $from";

mail($to,$subject,$body,$message);
echo "<script>alert('Check your email for further instructions!')</script>";
$conn->close();
}
else
{
echo "<script>alert('You must fill-in all input fields!')</script>";
$conn->close();
}
}

?>

[/php]
login.php

[php]

<?php
session_start();
require "conn.php";
if(isset($_POST["member_login_submit"]))
{
    if(!empty($_POST["member_login_username_or_email"]) && !empty($_POST["member_login_password"]))
    {
        $member_login_username_or_email = trim($_POST["member_login_username_or_email"]);
        $member_login_password = trim($_POST["member_login_password"]);
        
        $member_login_username_or_email = mysqli_real_escape_string($conn,$_POST["member_login_username_or_email"]);
        $member_login_password = mysqli_real_escape_string($conn,$_POST["member_login_password"]);
        
        $sql = "SELECT * FROM users WHERE Username='".$member_login_username_or_email."' OR Email='".$member_login_username_or_email."' AND Password='".$member_login_password."'";
        $result = mysqli_query($conn,$sql);
        $numrows = mysqli_num_rows($result);        
        if($numrows != 0)
        {
            while ($row = mysqli_fetch_assoc($result))
            {
                $db_id = $row["Id"];
                $db_username = $row["Username"];
                $db_password = $row["Password"];
                $db_email = $row["Email"];                                        
                if  ($member_login_username_or_email == $db_username && $member_login_password == $db_password || $member_login_username_or_email == $db_email && $member_login_password == $db_password)            
                {
                    $user = $db_username;
                    $userid = $db_id;
                    $_SESSION["user"] = $user;
                    if(!empty($_POST["member_login_remember"]))
                    {
                        setcookie("member_login_username_or_email", $member_login_username_or_email, time()+ (10 * 365 * 24 * 60 * 60));
                        setcookie("member_login_password", $member_login_password, time()+ (10 * 365 * 24 * 60 * 60));                        
                    }
                    else
                    {
                        if(isset($_COOKIE["member_login_username_or_email"]))
                        {
                            setcookie("member_login_username_or_email", "", "");
                        }
                        if(isset($_COOKIE["member_login_password"]))
                        {
                            setcookie("member_login_password", "", "");
                        }
                    }    
                header("location:home.php");
                }
                else
                {
                    echo "<script>alert('Incorrect account details!')</script>";
                    $conn->close();
                }
            }
        }
        else
        {
            echo "<script>alert('Incorrect User details!')</script>";
            $conn->close();
        }
    }
    else
    {
        echo "<script>alert('You must type in your account Username or Email and then the Password!')</script>";
        $conn->close();
    }
}

?>
<!DOCTYPE html>
<html>
<head>
<title>Member Login Page</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class = "container">
<form method="post" action="">
<center><h3>Member Login Form</h3></center>
<div class="text-danger">
<div class="form-group">
<center><label for="member-login-username-or-email">Username/Email:</label>
<input type="text" class="form-control" placeholder="Enter Username or Email" name="member_login_username_or_email" value="<?php if(isset($_COOKIE["member_login_username_or_email"])) echo $_COOKIE["member_login_username_or_email"]; ?>"</center>
</div>
<div class="form-group">
<center><label for="member-login-password">Password:</label>
<input type="password" class="form-control" placeholder="Enter password" name="member_login_password" value="<?php if(isset($_COOKIE["member_login_password"])) echo $_COOKIE["member_login_password"] ;?>"></center>
</div>
<div class="form-group">
<center><label for="member-login-remember">Remember Login Details:</label>
<input type="checkbox" name="member_login_remember" /></center>
</div>
<div class="form-group">
<center><input type="submit" name="member_login_submit" value="Login" class="button button-success" /></center>
</div>
<div class="form-group">
<center><font color="red" size="3"><b>Forgot your password ?</b><br><a href="member_login_password_reset.php">Reset it here!</a></font></center>
<center><font color="red" size="3"><b>Not registered ?</b><br><a href="member_register.php">Register here!</a></font></center>
</form>
</div>
</body>
</html>

[/php]
home.php

[php]

<html>
<head>
<title>
$user Home Page
</title>
</head>
<body>
<body background=".png">

<?php
session_start();
require "conn.php";

/*Check if user is logged-in or not by checking if session is set or not.
If user is not logged-in then redirect to login page. Else, show user's account's homepage.php.*/

if(!isset($_SESSION["user"]))
{
    header("location:login.php");
}
else
{
    $user = $_SESSION["user"];
    $query = "SELECT * FROM users WHERE Username = '".$user."'";
    $result = mysqli_query($conn,$query);
    while($row = mysqli_fetch_assoc($result))
    {
        $db_id = $row["Id"];
        $db_username = $row["Username"];
        $db_forename = $row["Forename"];
        $db_surname = $row["Surname"];
        $db_email = $row["Email"];
        $db_bio = $row["Bio"];
        $db_status = $row["Status"];
    
    
        //Welcome user by name.
        echo "<center>Welcome <b><h2>$db_forename $db_surname!</center>"?></h2></b>|

        <?php
        //Display log-out link.
        echo "<p align='right'><a href='logout.php'>$user Log Out</a>";?>|</p><br>
    
        <form method="post" action="">    
        <div class="form-group">
        <center><label for="post_status_to_friends">Post Status To Friends:</label>
        <input type="text" class="form-control" id="post_status_to_friends" placeholder="Post Status To Friends" name="post_status_to_friends"></center><br>
        <center><button type="submit" class="btn btn-default" name="post_status_to_friends">Post Status To Friends!</button></center>
        </div>

        <form method="post" action="">
        <div class="form-group">
        <center><label for="post_status_to_public">Post Status To Public:</label>
        <input type="text" class="form-control" id="post_status_to_public" placeholder="Post Status To Public" name="post_status_to_public"></center><br>
        <center><button type="submit" class="btn btn-default" name="post_status_to_public">Post Status To Public!</button></center>
        </div>
    
        <?php
        //Post User Status To Friends in $user table.
    
        if  (isset($_POST['post_status_to_friends']))
        {
            $status_to_friends = trim($_POST["post_status_to_friends"]);
            $status_to_friends = mysqli_real_escape_string($conn,$status_to_friends);
        
            $conn->query("UPDATE $user SET Status_To_Friends $status_to_friends WHERE Username = '".$user."'");
            if($conn->query($sql)===TRUE)
            {
            echo "posted status for friends to $user table!";
            $conn->close();
            exit();
            }
        else    
        {
            echo "posting status for friends to $user table failed!";
            $conn->close();
            exit();
        }
    
        //Post User Status To Friends in users table.
        $conn->query("UPDATE users SET Status_To_Friends $status_to_friends WHERE Username = '".$user."'");
        if($conn->query($sql)===TRUE)
        {
            echo "posted status for friends to users table!";
            $conn->close();
            exit();
        }
        else    
        {
            echo "posting status for friends to users table failed!";
            $conn->close();
            exit();
        }
        
        //Display User Status To Friends. Search for User's data with $user.
            
        $query = "SELECT * FROM $user WHERE Username = '".$user."'";
        $result = mysqli_query($conn,$query);
        $numrows = mysqli_num_rows($result);
        if($numrows = 0)
        {        
        echo "No data!";
        $conn->close();
        exit();
        }
        else
        {
            while($row = mysqli_fetch_assoc($result))
            {      
                $db_status_to_friends = $row["Status_To_Friends"];
            }
            echo "<br><b>$user Status To Friends:</b><br>
            $db_status_to_friends";?><br>
            <br>
    
        <?php
        //Post User Status To Public in $user table.
    
        if  (isset($_POST['post_status_to_public']))
        {
            $status_to_public = trim($_POST["post_status_to_public"]);
            $status_to_public = mysqli_real_escape_string($conn,$status_to_public);
        
            $conn->query("UPDATE $user SET Status_To_Public $status_to_public WHERE Username = '".$user."'");
            if($conn->query($sql)===TRUE)
            {
                echo "posted status for public to $user table!";
                $conn->close();
                exit();`
            }
            else    
            {
                echo "posting status for public to $user table failed!";
                $conn->close();
                exit();
            }
    
        //Post User Status To Public in users table.
        $conn->query("UPDATE users SET Status_To_Public $status_to_public WHERE Username = '".$user."'");
        if($conn->query($sql)===TRUE)
        {
            echo "posted status for public to users table!";
            $conn->close();
            exit();
        }
        else    
        {
            echo "posting status for public to users table failed!";
            $conn->close();
            exit();
        }
    
        //Display User Status To Public. Search for User's data with $user.
            
        $query = "SELECT * FROM $user WHERE Username = '".$user."'";
        $result = mysqli_query($conn,$query);
        $numrows = mysqli_num_rows($result);
        if($numrows = 0)
        {        
            echo "No data!";
            $conn->close();
            exit();
        }
        else
        {
            while($row = mysqli_fetch_assoc($result))
            {      
                $db_status_to_public = $row["Status_To_Public"];
            }
            echo "<br><b>$user Status To Public:</b><br>
            $db_status_to_public";?><br>
            <br>
      
        <?php
        //Display User Bio.  
        echo "<br><b>Bio:</b><br>
        $db_bio";?><br>
        <br>

        <?php
        //Display iFrame.?>
        <iframe src="https://www.w3schools.com"></iframe>
        <?php
        }    
    }
}
?>

</body>
</html>

[/php]
activate_account.php

[php]

<?php
session_start();
require "conn.php";

    //Grab User's (account activator's) email and account activation code from account activation link's url. Check for email and account activation code details in the account activation link's url.
    
if(!isset($_GET["email"], $_GET["member_registration_account_activation_code"]) === TRUE)
{
    echo "<script>alert('Invalid Email Address! Invalid Account Activation Link! This email is not registered! Try registering an account!')</script>";
    echo "Invalid Email Address! Invalid Account Activation Link! This email is not registered! Try registering an account if you do not already have one! <a href="register.php">Register here!</a>";
    $conn->close();
    exit();
}
else
{
    $confirmed_email = trim($_GET["email"]);
    $member_registration_account_activation_code = trim($_GET["member_registration_account_activation_code"]);
    
    $confirmed_email = mysqli_real_escape_string($conn,$confirmed_email);
    $member_registration_account_activation_code = mysqli_real_escape_string($conn,$member_registration_account_activation_code);
    
    
    //Check User's Username against "users" tbl to see if it has already been taken or not whilst the User was in midst of activating his/her account. Give error message if already taken.
    
    $query = "SELECT * FROM users WHERE Email = '".$confirmed_email."'";
    $result = mysqli_query($conn,$query);
    $numrows = mysqli_num_rows($result);
    if($numrows != 0)
    {    
        echo "<script>alert('That email '".$confirmed_email."' is already registered! So, just login!')</script>";
        echo "That email '".$confirmed_email."' is already registered! So, just <a href="login.php">login here!</a>";
        $conn->close();
        exit();
    }
    else
    {
        //Grab User's details from "pending_users" table. Search for User's data with his/her confirmed Email Address.
            
        $query = "SELECT * FROM pending_users WHERE Email = '".$confirmed_email."'";
        $result = mysqli_query($conn,$query);
        $numrows = mysqli_num_rows($result);
        if($numrows = 0)
        {        
            echo "<script>alert('Invalid Email Address! Invalid Account Activation Link! This email is not registered! Try registering an account!')</script>";
            echo "Invalid Email Address! Invalid Account Activation Link! This email is not registered! Try registering an account if you do not already have one! <a href="register.php">Register here!</a>";
            $conn->close();
            exit();
        }
        else
        {
            while($row = mysqli_fetch_assoc($result))
            {      
                $db_id = $row["Id"];
                $db_username = $row["Username"];
                $db_password = $row["Password"];
                $db_email = $row["Email"];
                $db_forename = $row["Forename"];
                $db_surname = $row["Surname"];
                $db_account_activation_code = $row["Account_Activation_Code"];
                $db_account_activation = $row["Account_Activation"];            
        
                if($db_account_activation != 0)    
                {
                    echo "<script>alert('Since your account is already activated, why are you trying to activate it again ? Just login!')</script>";
                    echo "Since your account is already activated, why are you trying to activate it again ? Just <a href="login.php">login here!</a>";
                    $conn->close();
                    exit();
                }
                else
                {
                    $conn->query("UPDATE pending_users SET Account_Activation 1 WHERE Email = '".$confirmed_email."'");
                    
                    
                    //Create table under $username to hold User's account activity data.

                    $sql = "CREATE TABLE $db_username (
                    Id INT(10) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
                    Date_&_Time TIMESTAMP NOT NULL ON UPDATE CURRENT_TIMESTAMP,
                    Account_Activation_Code varchar(10) NOT NULL,
                    Username varchar(30) NOT NULL,
                    Password varchar(32) NOT NULL,
                    Email varchar(50) NOT NULL,
                    Forename varchar(30) NOT NULL,
                    Surname varchar(30) NOT NULL,
                    Profile_Pic longblob NULL,
                    Bio varchar(250) NOT NULL,
                    Status_To_Friends varchar(180) NOT NULL)
                    Status_To_Public varchar(180) NOT NULL)";
    
                    if ($conn->query($sql) != TRUE)
                    {
                        echo "Error creating table under $username to hold User's account activity data!: " . mysqli_error($conn);
                        $conn->close();
                    }
                    else
                    {
                        //Copy $user's registration data from "pending_users" table to "$username" table.
    
                        $sql = "INSERT INTO $db_username (Username,Password,Email,Forename,Surname,Account_Activation_Code) VALUES('$db_username','$db_password','$db_email','$db_forename','$db_surname','$db_account_activation_code')";

                        if($conn->query($sql) != TRUE)
                        {
                            echo "inserting data into $db_username table failed! " . mysqli_error($conn);
                            $conn->close();
                            
                        }
                        else
                        {    
                            //Copy $user's registration data from table "pending_users" to table "users".
    
                            $sql = "INSERT INTO users (Username,Password,Email,Forename,Surname,Account_Activation_Code) VALUES('$db_username','$db_password','$db_email','$db_forename','$db_surname','$db_account_activation_code')";

                            if($conn->query($sql) != TRUE)
                            {
                                echo "inserting data into table users failed! " . mysqli_error($conn);
                                $conn->close();
                                
                            }
                            else
                            {    
                                $user = $db_username;
                                $userid = $db_id;
                                $_SESSION["user"] = $user;
                        
                        
                                //Redirect newly activated user to his/her account homepage.
                                
                                header("location:home.php");    
                            }
                        }    
                    }    
                }
            }
        }
    }
}

?>

[/php]

Hi,

in this case the error message is very descriptive:

PHP Parse error: syntax error, unexpected '"', expecting '-' or identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in /home/sn/public_html/sn/home.php on line 168

It points to a specific file and line of the code. If you don't find the error in that line then search above. On line 133 of home.php there is a backtick:

exit();` // <-- remove this

If you want to learn PHP, learn to reproduce bugs: isolate the code that generates the error and try to get the same error message:

<?php

print 'hello';`
print 'world';

Generates:

PHP Parse error: syntax error, unexpected end of file, expecting '`' in /tmp/a.php on line 5

Also the backtick operator as a specific meaning in PHP as it's an alias of shell_exec(), you can run a command like this:

$arg  = array_key_exists(1, $argv) ? escapeshellarg($argv[1]) : '';
print `find . -type f -iname "$arg" 2> /dev/null`;

> php a.php *.jpg

More info: http://php.net/manual/en/language.operators.execution.php
The comment part of the manual, sometimes, is very useful.

Thank you cereal for replying!
I now feel like having a cereal. Shreddies or Weetabix! Lol!

Anyway, my real problem was at line 129. Fixed that now as there was an
`
after exit ();.

However, I now get error:

"PHP Parse error: syntax error, unexpected end of file in /home/sn/public_html/sn/home.php on line 194".

My code is this:

homepage.php

[php]
<html>
<head>
<title>
$user Home Page
</title>
</head>
<body>
<body background=".png">

<?php
session_start();
require "conn.php";

/*Check if user is logged-in or not by checking if session is set or not.
If user is not logged-in then redirect to login page. Else, show user's account homepage.php.*/

if(!isset($_SESSION["user"]))
{
    header("location:login.php");
}
else
{
    $user = $_SESSION["user"];
    $sql = "SELECT * FROM users WHERE Username = '".$user."'";
    $result = $mysqli->query($sql);
    while($row = $result->fetch_assoc())
    {
        $db_id = $row["Id"];
        $db_username = $row["Username"];
        $db_forename = $row["Forename"];
        $db_surname = $row["Surname"];
        $db_email = $row["Email"];
        $db_bio = $row["Bio"];
        $db_status = $row["Status"];
    
    
        //Welcome user by name.
        echo "<center>Welcome <b><h2>$db_forename $db_surname!</center>"?></h2></b>|

        <?php
        //Display log-out link.
        echo "<p align='right'><a href='logout.php'>$user Log Out</a>";?>|</p><br>
    
        <form method="post" action="">    
        <div class="form-group">
        <center><label>Post Status To Friends:</label>
        <input type="text" placeholder="Post Status To Friends" name="post_status_to_friends" /></center><br>
        <center><button type="submit" class="btn btn-default" name="post_status_to_friends" />Post Status To Friends!</button></center>
        </div>

        <form method="post" action="">
        <div class="form-group">
        <center><label>Post Status To Public:</label>
        <input type="text" placeholder="Post Status To Public" name="post_status_to_public" /></center><br>
        <center><button type="submit" class="btn btn-default" name="post_status_to_public" />Post Status To Public!</button></center>
        </div>
    
        <?php
        //Post User Status To Friends in $user table.
        
        if  (isset($_POST['post_status_to_friends']))
        {
            $status_to_friends = trim($_POST["post_status_to_friends"]);
            $status_to_friends = mysqli_real_escape_string($conn,$status_to_friends);
        
            $conn->query("UPDATE $user SET Status_To_Friends $status_to_friends WHERE Username = '".$user."'");
            if($conn->query($sql)===TRUE)
            {
                echo "posted status for friends to $user table!";
                $conn->close();
                exit();
            }
            else    
            {
                echo "posting status for friends to $user table failed!";
                $conn->close();
                exit();
            }
    
            //Post User Status To Friends in "users" table.
        
            $conn->query("UPDATE users SET Status_To_Friends $status_to_friends WHERE Username = '".$user."'");
            if($conn->query($sql)===TRUE)
            {
                echo "posted status for friends to users table!";
                $conn->close();
                exit();
            }
            else    
            {
                echo "posting status for friends to users table failed!";
                $conn->close();
                exit();
            }
        
            //Display User Status To Friends. Search for User's data with $user.
            
            $query = "SELECT * FROM $user WHERE Username = '".$user."'";
            $result = mysqli_query($conn,$query);
            $numrows = mysqli_num_rows($result);
            if($numrows = 0)
            {        
                echo "No data!";
                $conn->close();
                exit();
            }
            else
            {
                while($row = mysqli_fetch_assoc($result))
                {      
                    $db_status_to_friends = $row["Status_To_Friends"];
                }
            echo "<br><b>$user Status To Friends:</b><br>
            $db_status_to_friends";?><br>
            <br>
            }
    
        <?php
        //Post User Status To Public in $user table.
    
        if  (isset($_POST['post_status_to_public']))
        {
            $status_to_public = trim($_POST["post_status_to_public"]);
            $status_to_public = mysqli_real_escape_string($conn,$status_to_public);
        
            $conn->query("UPDATE $user SET Status_To_Public $status_to_public WHERE Username = '".$user."'");
            if($conn->query($sql)===TRUE)
            {
                echo "posted status for public to $user table!";
                $conn->close();
                exit();
            }
            else    
            {
                echo "posting status for public to $user table failed!";
                $conn->close();
                exit();
            }
    
            //Post User Status To Public in users table.
            $conn->query("UPDATE users SET Status_To_Public $status_to_public WHERE Username = '".$user."'");
            if($conn->query($sql)===TRUE)
            {
                echo "posted status for public to users table!";
                $conn->close();
                exit();
            }
            else    
            {
                echo "posting status for public to users table failed!";
                $conn->close();
                exit();
            }
    
            //Display User Status To Public. Search for User's data with $user.
            
            $query = "SELECT * FROM $user WHERE Username = '".$user."'";
            $result = mysqli_query($conn,$query);
            $numrows = mysqli_num_rows($result);
            if($numrows = 0)
            {        
                echo "No data!";
                $conn->close();
                exit();
            }
            else
            {
                while($row = mysqli_fetch_assoc($result))
                {      
                    $db_status_to_public = $row["Status_To_Public"];
                }
            echo "<br><b>$user Status To Public:</b><br>
            $db_status_to_public";?><br>
            <br>
            }
        }
    <?php
    //Display User Bio.  
    echo "<br><b>Bio:</b><br>
    $db_bio";?><br>
    <br>

    <?php
    //Display iFrame.?>
    <iframe src="https://www.w3schools.com"></iframe>
    <?php            
    }
}
?>

</body>
</html>
[/php]

You're welcome! Look at lines 179 and 187. In the first case you have to close the PHP tag ?>, in the second case you have:

//Display iFrame.?>

Here the closing tag is hidden by the comment //.

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