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run code in 200+ php & hhvm versions
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<?php $arr = array(); $arr['test'];
based on T7WSV
Output for 5.3.0 - 7.2.6
Notice: Undefined index: test in /in/A2E01 on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: test in /in/A2E01 on line 3