[Solved] Tracing a syntax error in my PHP code [closed]

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Try this 

  <?php
    // check for errors
    error_reporting(E_ALL);
    ini_set('display_errors', True);

    // deny access if not logged
    if (!session_id()) session_start();
    if (!$_SESSION['logon']){ 
        header("Location:login.php");
        die();
    }
    $username = $_POST['username'];  //martin
    $password = $_POST['password']; //123456
        if (isset($_POST['username'])) 
    {   
        // connect to server
        $con = mysql_connect("localhost", "root", "");
        if(!$con){
            die('Could not connect: '. mysql_error());}
        mysql_select_db("test", $con);
        if(mysql_num_rows(mysql_query("SELECT * FROM users where username="$username" AND password = '$password'")))

{
     //Correct information
        $sql = "SELECT * FROM users where username="$username" AND password = '$password'";
        $result = mysql_query($sql);
        if (!$result) {
           die('Invalid query: ' . mysql_error());
        }
        while($row = mysql_fetch_array($result))
        {

        $expire = time()+60*60*24*30;//1 month
        setcookie("id", $row['id'], $expire);
        }

        mysql_close($con);
        }


        }
    ?>

4

solved Tracing a syntax error in my PHP code [closed]