title: CHECK PHP SESSION - ISSET($SESSION - IS NOT WORKING
body: <p>This is in my page, and it should check that a user is logged in on
  <a href="http://carbonyzed.co.uk/Websites/Jason/sites/2/test/login_success.php" rel="noreferrer">http://carbonyzed.co.uk/Websites/Jason/sites/2/test/login_success.php</a></p>
  
  <p>but anybody can assess it, not just those logged in</p>
  
  <pre><code>&lt;?php
  session_start();
  if( isset($_SESSION["myusername"]) ){
  header("location:main_login.html");
  }
  ?&gt;
  </code></pre>
  
  <p>I have tried</p>
  
  <p><strong>if( isset($_SESSION["myusername"]) ){</strong></p>
  
  <p>and</p>
  
  <p><strong>if( isset($_SESSION[$myusername]) ){</strong></p>
  
  <p><strong>LOGIN CODE</strong> perhaps a session isn't being created?</p>
  
  <pre><code>&lt;?php
  
  ob_start();
  $host="ClubEvents.db.9606426.hostedresource.com"; // Host name 
  $username="ClubEventsRead"; // Mysql username 
  $password="Pa55word!"; // Mysql password 
      $db_name="ClubEvents"; // Database name 
  $tbl_name="members"; // Table name 
  
  // Connect to server and select databse.
  mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
  mysql_select_db("$db_name")or die("cannot select DB");
  
  // Define $myusername and $mypassword 
  $myusername=$_POST['myusername']; 
  $mypassword=$_POST['mypassword']; 
  
  // To protect MySQL injection (more detail about MySQL injection)
  $myusername = stripslashes($myusername);
  $mypassword = stripslashes($mypassword);
      $myusername = mysql_real_escape_string($myusername);
  $mypassword = mysql_real_escape_string($mypassword);
  $sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
  $result=mysql_query($sql);
  
  // Mysql_num_row is counting table row
  $count=mysql_num_rows($result);
  
  // If result matched $myusername and $mypassword, table row must be 1 row
  if($count==1){
  
  // Register $myusername, $mypassword and redirect to file "login_success.php"
  session_register("myusername");
  session_register("mypassword"); 
  header("location:login_success.php");
  }
  else {
  echo "Wrong Username or Password";
  }
  ob_end_flush();
  ?&gt;
  </code></pre>