Question

How to set specific bits in a char with PHP

Answer 1

function print_binary($ch) {
    echo str_pad(decbin($ch), 8, '0', STR_PAD_LEFT) . "\n";
}

$ch = 0;
$ch |= (1 << 7); // Set the 7th bit
$ch |= (1 << 3); // Set the 3rd bit

print_binary($ch);        // Binary representation
echo "Value: $ch\n";      // Decimal value



/*
run:

10001000
Value: 136

*/

 

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