$binary_value = pack("C*",10);
$hex_value = 0xFFFFFFFF;
echo $hex_value ^ $binary_value

$hex_value ^ (int)$binary_value;
$hex_value ^ intval($binary_value);
$hex_value ^ bin2hex($binary_value);
$hex_value ^ bindec($binary_value);
$hex_value ^ intval(bin2hex($binary_value));
$hex_value ^ base_convert($int, 2, 16)

$hex_value ^ ord($binary_value);