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<?php namespace { const CONSTANT = 'GLOBAL'; $closure = function () { var_dump(CONSTANT); }; $closure = $closure->bindTo(null, 'Foo\\Scope'); $closure(); $closure = $closure->bindTo(null, 'Bar\\Scope'); $closure(); } namespace Foo { const CONSTANT = __NAMESPACE__; class Scope {} } namespace Bar { const CONSTANT = __NAMESPACE__; class Scope {} }

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