echo decBinary($firstValue, 64) . "\n";
echo '-------------------' . "\n";
echo decBinary($not) . "\n\n\n";
echo 'ZERO NOT (~) [64 bits]:' . "\n";
echo decBinary(0, 64) . "\n";
echo '-------------------' . "\n";
echo decBinary($zeroNot) . "\n\n\n";
echo 'SHIFT LEFT (2^1) (x2):' . "\n";
echo decBinary($firstValue, 16) . "\n";
echo '-----------------------------' . "\n";
echo decBinary($shiftLeft, 16) . "\n\n\n";
echo 'SHIFT TWICE LEFT (2^2) (x4):' . "\n";
echo decBinary($firstValue, 16) . "\n";
echo '-----------------------------' . "\n";
echo decBinary($shiftTwiceLeft, 16) . "\n\n\n";
echo 'SHIFT RIGHT (2^1) (/2):' . "\n";
echo decBinary($firstValue, 16) . "\n";
echo '-----------------------------' . "\n";
echo decBinary($shiftRight, 16) . "\n\n\n";
echo 'SHIFT TWICE RIGHT (2^2) (/4):' . "\n";
echo decBinary($firstValue, 16) . "\n";
echo '-----------------------------' . "\n";
echo decBinary($shiftTwiceRight, 16) . "\n\n\n";
function decBinary($value, $positions = 8)
{
return sprintf('%5d', $value) . ': ' . binary($value, $positions);
}
function binary($value, $positions = 8)
{
return sprintf('%0' . $positions . 'b', $value);
}
$decimal = 56;
$octal = 0123;
//83
$hex = 0xaa;
// 170
$binary = 0b10100101;
// 165
$float = 567.8;
$floatE = 5000.0;
// 5 x (10 ^ 3)
echo 'Decimal: ' . $decimal . "\n";
echo 'Octal: ' . $octal . "\n";
echo 'Hexadecimal: ' . $hex . "\n";
echo 'Binario: ' . $binary . "\n\n";
echo 'Float: ' . $float . "\n";
echo 'FloatE: ' . $floatE . "\n\n";
$maxInt = PHP_INT_MAX;
$negativeMaxInt = -PHP_INT_MAX;
$overflow = PHP_INT_MAX + 1;
echo 'PHP_INT_MAX [64 bits]: ' . decBinary($maxInt, 64) . ' typeof: ' . gettype($maxInt) . "\n";
echo '-PHP_INT_MAX [64 bits]: ' . decBinary($negativeMaxInt, 64) . ' typeof: ' . gettype($negativeMaxInt) . "\n";
//Nótese que en caso de desbordamiento de entero, PHP no lanza ningún Warning ni peta ni nada, simplemente se convierte a double:
echo 'PHP_INT_MAX + 1 (overflow?) [64 bits]: ' . decBinary($overflow, 64) . ' typeof: ' . gettype($overflow) . "\n";
function decBinary($value, $positions = 8)
{
return sprintf('%5d', $value) . ': ' . binary($value, $positions);
}
function binary($value, $positions = 8)
{
return sprintf('%0' . $positions . 'b', $value);
}
