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<?php foo(unset($x));
Output for 5.5.24 - 5.5.31, 5.6.8 - 5.6.17, 7.0.0 - 7.0.2
Parse error: syntax error, unexpected 'unset' (T_UNSET) in /in/Q2BOk on line 3
Process exited with code 255.
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160.51 ms | 1395 KiB | 28 Q