simple php migration fail

migrate.php

<?php

function convert($string) {
  return strtotime($string);
}

$mysqli = mysqli_connect("osx", 'my_user', 'my+p1', 'my_host');
$res = mysqli_query($mysqli, "SELECT donationId, donationDate, donationTime from GeneralDonations where donationTime IS NULL");

// while ($row = mysqli_fetch_assoc($res)) {
// $row['donationTime'] = strtotime($row['donationDate']);
while ($row = mysqli_fetch_assoc($res)) {
  printf('%sswft (%s)\n', $row[‘donationId’], $row[‘donationTime’]);
  $sql = "UPDATE GeneralDonations SET donationTime=" . strtotime($row['donationDate']) . "WHERE donationId =" . $row['donationId']);
  echo $sql;
   if (mysqli_query($mysqli, $sql)) {
     echo "Record updated successfully";
   } else {
     echo "Error: " . mysqli_error($mysqli);
   }
     mysqli_close($mysqli);
  }

?>

return.md

php -a 5 (1429237428) 6 (1429237651) 7 (1429285394) 8 (1429286366) 9 (1429304741) 10 (1429304887)

php -f migrate.php Parse error: syntax error, unexpected '%', expecting ')' in /home/habitatnashville/habitatnashville.org/me1.php on line 6