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run code in 150+ php & hhvm versions
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<?php $a = array( 'test' => 1, 'hi' => 3, ); foreach ($a as $b => $b) { var_dump($b); }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
string(4) "test" string(2) "hi"