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run code in 150+ php & hhvm versions
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<?php $test['sfdgfdg'] = 'fdngnkfdklgn'; var_dump(empty($test['fgfdgh']), empty($test['sfdgfdg'])); $test['sfdgfdg'] = ''; var_dump(empty($test['sfdgfdg']));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) bool(false) bool(true)