Merge pull request 'Fix bug 193 http://118.25.96.118/bugzilla/show_bug.cgi?id=193' (#35) from Bug193-Martha into Hui-Organize

Reviewed-on: #35

Courses.php

@@ -494,6 +494,10 @@ include 'Header.php';
 		    echo '<hr><span class="alert alert-success" role="alert">' . $_SESSION['info_Courses_student'] . '</span>';
 		    $_SESSION['info_Courses_student'] = null;
 		}
+		if (isset($_SESSION['info_signup'])) {
+            echo  '<hr><div class="alert alert-danger" role="alert">' . $_SESSION['info_signup'] . '</div>';
+            $_SESSION['info_signup'] = null;
+		}
 		?>
 		<br><br>
 	    </div>

Script.php

@@ -70,10 +70,7 @@ if (!empty($_POST["form_signup"])) {
     // check if email is taken
     $result = mysqli_query($con, "SELECT * FROM users_table WHERE email='$email'");
     if (mysqli_num_rows($result) != 0) {
-        $_SESSION["info_signup"] = "Email address " . $email . "  is already in use.";
-        $_SESSION['user_fullname'] = null;
-        header("Location: signup.php");
-        return;
+        $_SESSION["info_signup"] = "Email address " . $email . "  is already in use.  You have already signed up?";
     }
 
     $_SESSION['user_fullname'] = $_POST["fullname"];
@@ -161,11 +158,9 @@ if (!empty($_POST["form_signup"])) {
 
     // check if email is taken
     $result = mysqli_query($con, "SELECT * FROM users_table WHERE email='$email'");
-    if (mysqli_num_rows($result) != 0) {
-        $_SESSION["info_signup"] = "Email address " . $email . "  is already in use.";
-        $_SESSION['user_fullname'] = null;
-        header("Location: signup.php");
-        return;
+    if(mysqli_num_rows($result) != 0)
+    {
+        $_SESSION["info_signup"]="Email address ".$email." is already in use.  Do you have an old LRR account?";
     }