$decimal = 10;
$binary = decbin($decimal);
echo $binary; // 输出:1010
$decimal = 10;
$binary = decbin($decimal);
$binary = str_pad($binary, 8, '0', STR_PAD_LEFT);
echo $binary; // 输出:00001010
$decimal = 10;
$binary = decbin($decimal);
$binary = str_pad($binary, 8, '0', STR_PAD_LEFT);
$part = substr($binary, 2, 4);
echo $part; // 输出:0010
$decimal = 10;
$binary = decbin($decimal);
$binary = str_pad($binary, 8, '0', STR_PAD_LEFT);
$replaced = str_replace('0', '1', $binary);
echo $replaced; // 输出:11111010
这些技巧可以帮助您在处理二进制字符串时更加灵活和高效。