How can you test which bits are set in a decimal number in PHP?

To test which bits are set in a decimal number in PHP, you can use the bitwise AND operator (&) with a bitmask that has only one bit set at a time. By performing bitwise AND operations between the decimal number and different bitmasks, you can determine which bits are set in the number. 

$decimalNumber = 42; // Example decimal number
$bitmasks = [1, 2, 4, 8, 16, 32, 64, 128]; // Array of bitmasks with only one bit set at a time

foreach ($bitmasks as $bitmask) {
    if ($decimalNumber & $bitmask) {
        echo "Bit $bitmask is set in the decimal number.\n";
    }
}

Keywords

bitwise operators decimal number set bits PHP testing

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