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<?php $arr = ['a' => 0]; var_dump(unset($arr['a']));
Output for 7.2.0 - 7.2.29, 7.3.0 - 7.3.16, 7.4.0 - 7.4.4
Parse error: syntax error, unexpected 'unset' (T_UNSET) in /in/6hM1g on line 5
Process exited with code 255.

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