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<?php var_dump(0 ?: 1 ?: 2); var_dump(0 ?: 0 ?: 2); var_dump(1 ?: 0 ?: 2);
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
int(1) int(2) int(1)