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run code in 200+ php & hhvm versions
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<?php namespace Test { function sqrt($arg=null) { return 'test'; } } namespace Second { function sqrt($arg=null) { return 'second'; } } namespace { use function Test\sqrt; echo sqrt(); }
based on PrYXW
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.8
test