title: Simple mysql Query to check if row exist
body: <p>I want to show user if he liked a image or not..
  for that I am creating php code</p>
  
  <pre><code>$userid=$_COOKIE['userid'];
  $sql = "SELECT * FROM likes WHERE `user_id`='{$userid}'"; 
  $query = mysqli_query($conn, $sql);
  $row = mysqli_fetch_assoc($query);
  if($row){
  echo "unlike";
  }
  else{
  echo "like";
  }
  </code></pre>
  
  <p>I can not do this for everything like 'tags', 'shares', 'comments', 'favourites' ...many
  Isn't there anything simpler than this...?
  Like say <code>$row_check=mysqli_check_exist($table,$column_name,$userid);</code></p>