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title: Generator strategies
---
# Generator strategies
ProxyManager allows you to generate classes based on generator strategies and a
given `Zend\Code\Generator\ClassGenerator` as of
the [interface of a generator strategy](https://github.com/Ocramius/ProxyManager/blob/master/src/ProxyManager/GeneratorStrategy/GeneratorStrategyInterface.php).
Currently, 3 generator strategies are shipped with ProxyManager:
* [`ProxyManager\GeneratorStrategy\BaseGeneratorStrategy`](https://github.com/Ocramius/ProxyManager/blob/master/src/ProxyManager/GeneratorStrategy/BaseGeneratorStrategy.php),
which simply retrieves the string representation of the class from `ClassGenerator`
* [`ProxyManager\GeneratorStrategy\EvaluatingGeneratorStrategy`](https://github.com/Ocramius/ProxyManager/blob/master/src/ProxyManager/GeneratorStrategy/EvaluatingGeneratorStrategy.php),
which calls `eval()` upon the generated class code before returning it. This is useful in cases
where you want to generate multiple classes at runtime
* [`ProxyManager\GeneratorStrategy\FileWriterGeneratorStrategy`](https://github.com/Ocramius/ProxyManager/blob/master/src/ProxyManager/GeneratorStrategy/FileWriterGeneratorStrategy.php),
which accepts a [`ProxyManager\FileLocator\FileLocatorInterface`](https://github.com/Ocramius/ProxyManager/blob/master/src/ProxyManager/FileLocator/FileLocatorInterface.php)
instance as constructor parameter, and based on it, writes the generated class to a file before returning its code.
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