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run code in 200+ php & hhvm versions
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<?php $buffer = 1; $picking = 2; $container = 4; $all = 7; var_dump(2 & $all);
Output for 5.6.30, hhvm-3.15.4 - 3.22.0, 7.0.0 - 7.3.0rc3
int(2)