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<?php define ('X', 9); const 'xyt' = [5,X]; var_dump(xyt);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
Parse error: syntax error, unexpected ''xyt'' (T_CONSTANT_ENCAPSED_STRING), expecting identifier (T_STRING) in /in/BS0s6 on line 4
Process exited with code 255.

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