silverstripe-framework/Core/Injector/BeforeCallAspect.php

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<?php
namespace SilverStripe\Core\Injector;
/**
* A BeforeCallAspect is run before a method is executed.
*
* This is a declared interface, but isn't actually required
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* as PHP doesn't really care about types...
*/
interface BeforeCallAspect {
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/**
* Call this aspect before a method is executed
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*
* @param object $proxied
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* The object having the method called upon it.
* @param string $method
* The name of the method being called
* @param string $args
* The arguments that were passed to the method call
* @param mixed $alternateReturn
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* An alternative return value that should be passed
* to the caller. Only has effect of beforeCall returns false
*/
public function beforeCall($proxied, $method, $args, &$alternateReturn);
}