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run code in 150+ php & hhvm versions
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<?php $data = array( 'c' => 2, 'x' => 4, 'd' => 6, ); print_r($data);
based on dJ8Rp
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [c] => 2 [x] => 4 [d] => 6 )