PHP echoing problems with class="" thinking that i'm passing a string

Question

<?php
          $dirlist = getFileList("");

          foreach($dirlist as $file) 
            {
            if(!preg_match("/\.zip$/", $file['name'])) continue;
            echo "<tr>";
            echo "<td>{$file['name']}</td>";
            echo "<td>{$file['type']}</td>";
            echo "<td>{$file['size']}</td>";
            echo "<td>",date('H:i:s | d, D M Y', $file['lastmod']),"</td>";
            echo "<td><a class="btn btn-linkp-a-5" href=".{$file['name']}," title="Download"><i class="fa fa-download"></i></a></td>";
            echo "</tr>";
            }
?>

This piece of code works, without the:

<a class="btn btn-linkp-a-5" href=".{$file['name']}," title="Download"><i class="fa fa-download"></i></a>

Due to the use of the class="". PHP is requesting a string and not getting one.

How can I solve this issue? - Thanks.