<?php
$hostname = '{imap.gmail.com:993/imap/ssl}INBOX';
$username = 'joesta@gmail.com';
$password = 'whatever';

echo $username;
$inbox = imap_open($hostname, $username, $password) or die('connect error: ' . imap_last_error() );
echo ' inbox: ' . $inbox . '<br>';
$emails = imap_search($inbox, 'ALL' );
if($emails) {
  rsort( $emails );
  foreach( $emails as $email ) {
    $overview = imap_fetch_overview( $inbox, $email, 0 );
    echo $overview[0]->subject;
    echo "<br>";
  }
}
imap_close( $inbox );

?>