我正在用PHP编写一个应用程序,它需要获取任意长度的1和0数组并将其转换为二进制变量(存储在MySQL BINARY字段中)。我还需要一个函数来反转这个过程。
我想最终得到:
$bits = array(0,1,0,1,1,1,0,1);
$bin = bits2bin($bits);
bin2hex($bin); // returns "5D"
$bits = bin2bits($bin); // = array(0,1,0,1,1,1,0,1);
我写了以下两个功能,它们可以满足我的需求:
function bits2bin($bits) {
$binarystring = implode($bits);
$bytes = str_split($binarystring, 8);
$hexstring = '';
foreach($bytes as $byte) {
$hexbyte = dechex(bindec($byte));
$hexbyte = str_pad($hexbyte, 2, "0", STR_PAD_LEFT);
$hexstring .= $hexbyte;
}
return $binary = pack('H*', $hexstring);
}
function bin2bits($binary) {
$hexbytes = unpack('H*', $binary);
$bits = array();
foreach(str_split($hexbytes[1], 2) as $hexbyte) {
$hexbyte = decbin(hexdec($hexbyte));
$hexbyte = str_pad($hexbyte, 8, "0", STR_PAD_LEFT);
foreach(str_split($hexbyte) as $bit) {
$bits[] = $bit;
}
}
return $bits;
}
数组应该可以是任意长度(例如3位,8位或10,000位),但如果使事情更容易,则可以仅限制为整个字节。
有更优雅/更有效的方法吗?
答案 0 :(得分:0)
试试这个:
function bits2bin($bits) {
return implode(array_map(function ($v) { return chr(bindec(implode($v))); }, array_chunk($bits,8)));
} //Will return the binary string which corresponds to those bits (hopefully) you can alternatively cast them in MySQL.
function bin2bits($binary) {
return str_split(base_convert(unpack("H*",$binary)[1],16,2));
}