AppEngine PHP read and write blob to datastore

问题

The Google AppEngine PHP API provides a way to read and write to a blob.

  public function setBlobValue($blobValue)
  {
    $this->blobValue = $blobValue;
  }
  public function getBlobValue()
  {
    return $this->blobValue;
  }

However this doesn't seem to work when writing / reading an html string stored in a blob, e.g.

$string = "<div>Test</div>"
$obj->setBlobValue(base64_encode($string));

then after a query:

$string = base64_decode($obj->getBlobValue());

doesn't work - is there something I'm doing wrong here?

(note this would be used to store much larger strings than the example here)

来源：https://stackoverflow.com/questions/31313381/appengine-php-read-and-write-blob-to-datastore