Echoing images uploaded in php to the DOM

two questions here: 1. I'm wondering what the correct way to write the following would be. As it is, it's pretty messy/unreadable:

 $stmt = $pdo->query("SELECT first_name, last_name, headline FROM Profile");
 while ( $row = $stmt->fetch(PDO::FETCH_ASSOC) ) {
 echo('<div class="col-sm-9">
  <div class="row">
    <div class="col-sm-3">
      <img class="img-rounded" src="img/left2.jpg">
      <p class="caption">');  
  echo(htmlentities($row['first_name'].$row['last_name']'</p>');
  echo(  '</div>');
}

2. Furthermore, I want to display uploaded images in the img tag within the echo statement provided above. I have copy & pasted file upload code provided by W3Schools found here: http://ift.tt/OfEuBn. How can I do this?

Thank you in advance for your help!! :D