PDO query can't be executed when trying to upload an image to the mysql database

PDO query can't be executed when trying to upload an image to the mysql
database

I am trying to add a picture into my mysql databse using the PDO queries.
It fails to execute the query and "failed to add the picture" is displayed
in the web browser. I get the following error message: Array ( [0] =>
HY093 [1] => [2] => ) MySQL error 1 When executing
Here is the code that I am using:
$email='test@yahoo.com';
$image=addslashes(file_get_contents($_FILES["image"]["tmp_name"]));
$sth = $dbh->prepare("UPDATE user SET driver_img = : driver_img WHERE
email = :email ");
$sth->bindParam(':email', $email, PDO::PARAM_STR, 100);
$sth->bindParam(':driver_img', $image, PDO::PARAM_LOB);
if($sth->execute()) {
echo "Managed to add the picture.";
}
else {
echo "failed to add the picture.";
$arr = $sth->errorInfo();
die("MySQL error <br>". print_r($arr) ."<br>When executing ");
}
The name of my database table is user. The attributes I am trying to
change are called driver_img and email.
Does anyone know what's wrong. Why can't the query be executed?