PHP开发api接口安全验证的实例，值得一看

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2017/3/16 0016
 * Time: 15:56
 */
namespace Client\Controller;
use Think\Controller;
class ClientController extends Controller{
 const TOKEN = 'API';
 //模拟前台请求服务器api接口
 public function getDataFromServer(){
  //时间戳
  $timeStamp = time();
  //随机数
  $randomStr = $this -> createNonceStr();
  //生成签名
  $signature = $this -> arithmetic($timeStamp,$randomStr);
  //url地址
  $url = "http://www.apitest.com/Server/Server/respond/t/{
   $timeStamp}/r/{
   $randomStr}/s/{
   $signature}";
  $result = $this -> httpGet($url);
  dump($result);
 }
 //curl模拟get请求。
 private function httpGet($url){
  $curl = curl_init();
  //需要请求的是哪个地址
  curl_setopt($curl,CURLOPT_URL,$url);
  //表示把请求的数据已文件流的方式输出到变量中
  curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
  $result = curl_exec($curl);
  curl_close($curl);
  return $result;
 }
 //随机生成字符串
 private function createNonceStr($length = 8) {
  $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  $str = "";
  for ($i = 0; $i < $length; $i++) {
   $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  }
  return "z".$str;
 }
 /**
  * @param $timeStamp 时间戳
  * @param $randomStr 随机字符串
  * @return string 返回签名
  */
 private function arithmetic($timeStamp,$randomStr){
  $arr['timeStamp'] = $timeStamp;
  $arr['randomStr'] = $randomStr;
  $arr['token'] = self::TOKEN;
  //按照首字母大小写顺序排序
  sort($arr,SORT_STRING);
  //拼接成字符串
  $str = implode($arr);
  //进行加密
  $signature = sha1($str);
  $signature = md5($signature);
  //转换成大写
  $signature = strtoupper($signature);
  return $signature;
 }
}

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2017/3/16 0016
 * Time: 16:01
 */
namespace Server\Controller;
use Think\Controller;
class ServerController extends Controller{
 const TOKEN = 'API';
 //响应前台的请求
 public function respond(){
  //验证身份
  $timeStamp = $_GET['t'];
  $randomStr = $_GET['r'];
  $signature = $_GET['s'];
  $str = $this -> arithmetic($timeStamp,$randomStr);
  if($str != $signature){
   echo "-1";
   exit;
  }
  //模拟数据
  $arr['name'] = 'api';
  $arr['age'] = 15;
  $arr['address'] = 'zz';
  $arr['ip'] = "192.168.0.1";
  echo json_encode($arr);
 }
 /**
  * @param $timeStamp 时间戳
  * @param $randomStr 随机字符串
  * @return string 返回签名
  */
 public function arithmetic($timeStamp,$randomStr){
  $arr['timeStamp'] = $timeStamp;
  $arr['randomStr'] = $randomStr;
  $arr['token'] = self::TOKEN;
  //按照首字母大小写顺序排序
  sort($arr,SORT_STRING);
  //拼接成字符串
  $str = implode($arr);
  //进行加密
  $signature = sha1($str);
  $signature = md5($signature);
  //转换成大写
  $signature = strtoupper($signature);
  return $signature;
 }
}

string(57) "{"name":"api","age":15,"address":"zz","ip":"192.168.0.1"}"