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

preferences:
41.3 ms | 402 KiB | 5 Q