<?php /* * 十进制转二进制、八进制、十六进制 * @params $data 将哪个十进制数转化, $decimal 转成哪个进制,$decimal=2/8/16 */ function decimalT($data, $decimal){ //如果为空直接返回 if(empty($data) || empty($decimal)){ return ; } $arr = array("0b"=>2,"0"=>8,"0x"=>16); $remainderArr = array(10=>'a', 11=>'b', 12=>"c", 13=>'d', 14=>"e", 15=>"f"); if(!in_array($decimal, $arr)){ return ; } $data = intval($data); //转化为整形 $remainder = 0; $remainderStr = ''; $remainder = ($data%$decimal) == 0?0:$data%$decimal; if($decimal == 16 && $remainder>=10){ $remainderStr .= $remainderArr[$remainder]; }else{ $remainderStr .= $remainder; } $temp = intval($data/$decimal); while($temp != 0){ $remainder = ($temp%$decimal) == 0?0:($temp%$decimal); if($decimal == 16 && $remainder>=10){ $remainderStr .= $remainderArr[$remainder]; }else{ $remainderStr .= $remainder; } $temp = intval($temp/$decimal); } $newArr = array_flip($arr); return $newArr[$decimal].strrev($remainderStr); } var_dump(decimalT(10, 2)); //0b1010 var_dump(decimalT(7, 8)); //07 var_dump(decimalT(31, 16)); //0x1f