php json 数据加密解密

<?php
namespace app\shuju\model;
class DataSecurityTool
{

    /**
     * 加密函数
     * @param [type] $context [description]
     * @return [type] [description]
     */
    public function opEncryption($context,$key_main = "this is main key", $key_sub = "this is sub key")
    {
        $key_main = str_split($key_main);
        $key_sub = str_split($key_sub);
        $context_bytes = str_split($context);
        $context_len = count($context_bytes);
        $cur_key_len = count($key_main);
        if (empty($context_bytes)) {
            return null;
        }
        $context_encrypted = [];
        for ($i = 0; $i < $context_len; $i++) {
            $context_encrypted[$i] = ord($context_bytes[$i] ^ $key_main[$i % $cur_key_len]);
        }
        $cur_key_len = count($key_sub);
        for ($i = 0; $i < $context_len; $i++) {
            $context_encrypted[$i] = $context_encrypted[$i] ^ ord($key_sub[$i % $cur_key_len]);
        }
        $data = array_map(function ($v) {
            return chr($v);
        }, $context_encrypted);
        return base64_encode(implode($data));
    }
    /**
     * 解密函数
     * @param [type] $context [description]
     * @return [type] [description]
     */
    public function opDecryption($context,$key_main = "this is main key", $key_sub = "this is sub key")
    {
        $key_main = str_split($key_main);
        $key_sub = str_split($key_sub);
        $context = base64_decode($context);
        $context_bytes = str_split($context);
        $context_len = count($context_bytes);
        $cur_key_len = count($key_sub);
        if (empty($context_bytes)) {
            return null;
        }
        $context_encrypted = [];
        for ($i = 0; $i < $context_len; $i++) {
            $context_encrypted[$i] = ord($context_bytes[$i] ^ $key_sub[$i % $cur_key_len]);
        }
        $cur_key_len = count($key_main);
        for ($i = 0; $i < $context_len; $i++) {
            $context_encrypted[$i] = $context_encrypted[$i] ^ ord($key_main[$i % $cur_key_len]);
        }
        $data = array_map(function ($char) {
            return chr($char);
        }, $context_encrypted);
        return implode("", $data);
    }
}
// //data for encrypt
// $info = ["access_token" => "as2009_12_34", "name" => "我的", "age" => 25, "sex" => "male"];
// $json_data = json_encode($info, JSON_UNESCAPED_UNICODE);
// $dataSec = new DataSecurityTool();
// //encrypt
// $encry_data = $dataSec->opEncryption($json_data);
// echo $encry_data;
// //decrypt
// $decry_data = $dataSec->opDecryption($encry_data);
// echo $decry_data;

注意如果传输的是 json 字符串的时候编码时json默认会将中文转码为unicode编码

如果是 php 5.4 可以方便的调用 JSON_UNESCAPED_UNICODE 选项告诉 json_encode 不要只能转码

如果是 php 5.4 以下的版本可以利用 urlencode 做一些封装

解决json中文乱码

<?php
/**
 * 通过 urlencode 将中文编码
 * @param array $json_arr [description]
 * @return [type] [description]
 */
function znJsonEncode(array $json_arr)
{
    $temp = array_map(function ($row) {
        return urlencode($row);
    }, $json_arr);
    return json_encode($temp);
}
/**
 * 先 urldecode
 * @param [type] $json_str [description]
 * @param boolean $arr [description]
 * @return [type] [description]
 */
function znJsonDecode($json_str, $arr = false)
{
    return json_decode(urldecode($json_str), $arr);
}