将URL插入MySQL DB时出现403错误

Question

奇怪的问题在这里。将URL插入我的一个字段时收到403错误。（奇怪的是，即使它是相同的数据类型，我也可以将它插入ShareImage中，并且我试图插入相同的东西）。问题仅在于PreviewImage列。两者都是数据库中的varchar（300）

这是我的pdo插入：

$previewShare = "http://www.google.com"; (this will insert fine on its 
own)
$fbshare = "http://www.google.com"; (with this I get a 403 but without the 
slashes is working fine)

   $sqlInsert = ("UPDATE comparisonProducts SET ShareImage = :si, 
   PreviewImage = :pi WHERE Site = :site AND Id = :product");
    }

  $preparedStatement = $db->prepare($sqlInsert);
  $preparedStatement->execute(array(':site' => $_SESSION['site'], ':si' => $fbShare, ':product' => $product, ':pi' => $previewShare));