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run code in 150+ php & hhvm versions
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<?php $initial = 'PROP_RESOURCE_TYPE'; $words = explode('_', $initial); print_r($words);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => PROP [1] => RESOURCE [2] => TYPE )