Changing follow to unfollow on click

[harman30]

I am trying a create a follow system, with this code but the follow button doesn't change to unfollow on click. I manually tried inserting values in database through phpmyadmin (so that one user now follows another). I should now see Unfollow but still shows as Follow. My db connection is in header file so I am using include header file.

Code on profile.php

   <?php include ( "./inc/header.inc.php" ); ?>

     <?php
       function is_loggedin()
     {
     return (!empty($_SESSION['user_login']));
     }
    function is_profile($user = false)
     {
     if(!$user)
        return false;

      return (is_loggedin() && ($_SESSION['user_login'] == $user));
      } 
   // If no user requested just assign false
     $user   =   (!empty($_GET['u']) && ctype_alnum($_GET['u']))? $_GET['u'] : false;
    // If the user is valid (not empty)

    if($user != false) {

    $username   =   mysql_real_escape_string($user);
    //check user exists
    $check      =   mysql_query("SELECT username, first_name FROM users WHERE username='$username'");

    if (mysql_num_rows($check) === 1) {
            $get        =   mysql_fetch_assoc($check);
            $username   =   $get['username'];
            $firstname  =   $get['first_name'];  
        }
    else {
            echo "<meta http-equiv=\"refresh\" content=\"0; url=http://localhost/tutorials/index.php\">"; 
            exit;
        }
        }

      $my_id = $_SESSION['user_login'];
      $u_id = $user;
      ?>

     <?php
     if($u_id !=$_SESSION['user_login']) {
     $check = mysql_query("SELECT id FROM follow WHERE user_one='$my_id' AND user_two='$u_id'");
     if(mysql_num_rows($check) == 1){
      echo "<a href='actions.php?action=Unfollow&u_id=$u_id'>Unfollow</a>";
       }
      else{
       echo "<a href='actions.php?action=Follow&u_id=$u_id'>Follow</a>";
       }
      }
     ?>

Code for actions.php

  
   <?php include ( "./inc/header.inc.php" ); 

   $my_id = $_SESSION['user_login'];
     $u_id = $user;
    ?>

   <?php
   $action = $_Get['action'];
   $u_id = $_GET['u_id'];

    if($action == 'Follow'){
   mysql_query("INSERT INTO follow VALUES ('','$my_id','$u_id')");
    }
      if($action == 'Unfollow'){
         mysql_query("DELETE FROM follow WHERE user_one='$my_id' AND  user_two='$u_id'");
    }
   header('Location: profile.php?u='.$u_id);
   ?>