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<?php var_dump(false & true); var_dump(true & false); var_dump(true & true); var_dump(false & false);
Output for 4.3.0 - 5.6.3, php7@20140507 - 20141101, hhvm-3.0.1 - 3.4.0
int(0) int(0) int(1) int(0)