I'm trying to serialize a Doctrine_query object in Symfony :
var_dump(serialize($this->pager->getQuery()));
The result is :
string(2) "N;"
What am I doing wrong?
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Tiois
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Obvious question: What does `var_dump($this->pager->getQuery());` give? – Tomalak Nov 11 '10 at 16:12
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The result of `$this->pager->getQuery()` is null... So that's what's being serialized... – ircmaxell Nov 11 '10 at 16:13
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I tried "print_r($this->pager->getQuery())" and I get a big ouput beginning with "Doctrine_Query Object"... with many *RECURSION* – Tiois Nov 12 '10 at 13:20
1 Answers
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You can not serialize every object in PHP. Objects themselves - by implementing the Serializeable interface PHP Manual - can protect themselves from being serialized for example.
They return a NULL value then (or don't return anything which is then NULL in PHP). And that's exactly the contents of your serialized string: a serialized NULL (N;).
And there are even some build-in classes that go even further than that. But it applies as well to user-defined classes and build-in classes: Some of them are not available for serialization.
One example of a built-in class that can not be serialized in PHP is DOMDocument, however it is possible to add the functionality as the following question demonstrates:
