title: How can I debug why simplest MySQL query returns false?
body: <p>I work with xampp. I performed MySQL connection:</p>
  
  <pre><code>$connection = mysql_connect($host , $user , $passw);
  mysql_select_db($db, $connection);
  </code></pre>
  
  <p>I received output with echo command (by check the boolean returned values) that connection is established and the database $db is found.</p>
  
  <p>But the simplest query like:</p>
  
  <pre><code>$query = mysql_query("SELECT * FROM 'users'");
  </code></pre>
  
  <p>returns false. How can I debug why?Thanks.</p>