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<?php var_dump($b ?? 1 ?? 2); // 1 var_dump($b ?? (1 ?? 2)); // 1 var_dump(($b ?? 1) ?? 2); // 1
based on 32EOf
Output for 7.0.0 - 7.2.0
int(1) int(1) int(1)
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/K7VDm on line 3
Process exited with code 255.