原文链接：https://www.jb51.net/article/82047.htm
/**
* 十进制转二进制、八进制、十六进制 不足位数前面补零*
*
* @param array $datalist 传入数据array(100,123,130)
* @param int $bin 转换的进制可以是：2,8,16
* @return array 返回数据 array() 返回没有数据转换的格式
*/
function decto_bin($datalist, $bin) {
static $arr = array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D', 'E', 'F');
if (!is_array($datalist))
$datalist = array($datalist);
if ($bin == 10)
return $datalist; //相同进制忽略
$bytelen = ceil(16 / $bin); //获得如果是$bin进制，一个字节的长度
$aOutChar = array();
foreach ($datalist as $num) {
$t = "";
$num = intval($num);
if ($num === 0)
continue;
while ($num > 0) {
$t = $arr[$num % $bin] . $t;
$num = floor($num / $bin);
}
$tlen = strlen($t);
if ($tlen % $bytelen != 0) {
$pad_len = $bytelen - $tlen % $bytelen;
$t = str_pad("", $pad_len, "0", STR_PAD_LEFT) . $t; //不足一个字节长度，自动前面补充0
}
$aOutChar[] = $t;
}
return $aOutChar;
}
/**
* 二进制、八进制、十六进制 转十进制*
*
* @param array $datalist 传入数据array(df,ef)
* @param int $bin 转换的进制可以是：2,8,16
* @return array 返回数据 array() 返回没有数据转换的格式
* @copyright chengmo QQ:8292669
*/
function bin_todec($datalist, $bin) {
static $arr = array('0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4, '5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9, 'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13, 'E' => 14, 'F' => 15);
if (!is_array($datalist))
$datalist = array($datalist);
if ($bin == 10)
return $datalist; //为10进制不转换
$aOutData = array(); //定义输出保存数组
foreach ($datalist as $num) {
$atnum = str_split($num); //将字符串分割为单个字符数组
$atlen = count($atnum);
$total = 0;
$i = 1;
foreach ($atnum as $tv) {
$tv = strtoupper($tv);
if (array_key_exists($tv, $arr)) {
if ($arr[$tv] == 0)
continue;
$total = $total + $arr[$tv] * pow($bin, $atlen - $i);
}
$i++;
}
$aOutData[] = $total;
}
return $aOutData;
}