pelma_analyse_service/app/Http/Services/CommonService.php

<?php
namespace App\Http\Services;


class CommonService{
    /**
     * 十进制小数转十六进制
     * @param float $decimal
     * @param $len
     * @return string
     */
    public static function customDec2hex(float $decimal, $len = 8) {
        $hex = '';
        $count = 0;
        # 只取小数部分
        $decimal = fmod($decimal, 1);
        while ($count++ < $len) {
            $dec16 = $decimal * 16;
            # 取整 转16进制
            $hex .= dechex((int)$dec16);
            # 取小数部分
            $decimal = fmod($dec16, 1);
        }
        return $hex;
    }

    /**
     * 十六进制小数转十进制
     * @param $hexadecimal
     * @return float|int
     */
    public static function customHex2dec($hexadecimal) {
        $dec = 0;
        for ($i = 0; $i < strlen($hexadecimal); $i++) {
            $dec += hexdec($hexadecimal[$i]) / pow(16, $i + 1);
        }

        return $dec;
    }

    /**
     * 校验码
     * @param $data
     * @return string|void
     */
    public function getCheckCode($data)
    {
        if ($data) {
            $arr = array();
            $arr = str_split($data, 2);
            $result = 0;
            for ($i = 0; $i < count($arr); $i++) {
                //把十六进制转换为十进制
                $result = $result + hexdec($arr[$i]);
            }
            $result = strtoupper('0' . dechex($result)); //转换成大写

            $result = substr($result, -2);
            return $result;
        }
    }
}