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I don't know why, but this PR resolve the error Can't use method return value in write context in PHP 5.4.14.
Whit this PR the response is normalized.
![screen shot 2016-11-10 at 18 06 37](https://cloud.githubusercontent.com/assets/610598/20192427/f94395d2-a770-11e6-8587-3c2806ae1cf8.png)
Aditional report
The other PHP versions are normal.