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run code in 200+ php & hhvm versions
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<?php const FLAG_1 = 0b0001; // 1 const FLAG_2 = 0b0010; // 2 const FLAG_3 = 0b0100; // 4 const FLAG_4 = 0b1000; // 8 // Can you see the pattern? ;-) function show_flags ($flags) { if ($flags & FLAG_1) { echo "You passed flag 1!\n"; } if ($flags & FLAG_2) { echo "You passed flag 2!\n"; } if ($flags & FLAG_3) { echo "You passed flag 3!\n"; } if ($flags & FLAG_4) { echo "You passed flag 4!\n"; } } show_flags(decbin(2));
based on CQLuN
Output for 5.6.0 - 7.3.0rc4
You passed flag 2! You passed flag 4!