PHP hexadecimal to binary code conversion

var_dump(decto_bin(array(128,253),2));
var_dump(decto_bin(array(128,253),8));
var_dump(decto_bin(array(128,253),16)) ;
 ;
 string(8) "10000000"
 [1]=>
 string(8) "11111101"
}
array(2) {
 [0]=>
 string(4) "0200"
 [1 ]=>
 string(4) "0375"
}
array(2) {
 [0]=>
 string(2) "80"
 [1]=>
 string(2) "FD"
}



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Code:

<?php 
/**
 *二进制、八进制、十六进制 转十进制
 * edit by bbs.it-home.org
 *
 * @param array $datalist 传入数据array(df,ef)
 * @param int $bin 转换的进制可以是：2,8,16
 * @return array 返回数据 array() 返回没有数据转换的格式
 */
function bin_todec($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;
}
?>

Test:

var_dump(bin_todec(array('1101101','111101101'), 2));
var_dump(bin_todec(array('1234123','12341'),8));
X-Powered-By: PHP/5.2.0
Content-type: text/html
array(3) {
 [0]=>
 int(255)
 [1]=>
 int(65331)
 [2]=>
 int (52275)
}
array(2) {
 [0]=>
 int(124)
 [1]=>
 int(508)
}
array(2) {
 [0]=>
 int(342099)
 [1]=>
 int(5345)
}



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