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run code in 150+ php & hhvm versions
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<?php $a = array(); $a['lol'] = 'fuu' or die; print_r($a); $a = array('lol' => 'fuu' or '0'); print_r($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [lol] => fuu ) Array ( [lol] => 1 )