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run code in 200+ php & hhvm versions
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<?php $data = new stdClass(); $data->uid = 234; if (!empty($data->uid)) { $uid = $data->uid[0]; print_r('UID' . $uid); if (empty($uid)) { print_r('empty'); } }
based on H4RhM
Output for 4.3.0 - 7.2.0
UIDempty