## curl请求http接口
```
<?php
namespace app\index\controller;
use think\Controller;
class Api extends Controller
{
const KEY = 'aaaaaaaaaaaaaaaaaaaaaaaa';
const APPID = 'bbbbbbbbbbbbbbbbbbbbbb';
const URL = 'https://api.test.com/api/gatdata';
//输出接口（get请求）
public function getData(){
//随机数
$randomStr = $this -> createNonceStr();
//接口方的appid
$appid = self::APPID;
//接口名
$api = 'abcd';
//生成签名
$arr = array();
$arr['nonce'] = "nonce=$randomStr";
$arr['api'] = "api=$api";
$signature = $this -> arithmetic($arr);
//请求地址
$url = self::URL;
//请求体
$query = [
'api'=>$api,
'nonce'=>$randomStr,
'sign'=>$signature
];
//get
$result = json_decode($this -> httpGet($url,$appid,$query),true);
//返回请求数据
return json(['data'=>$result]);
}
//输出接口（post）
public function postData(){
//随机数
$randomStr = $this -> createNonceStr();
$appid = self::APPID;
$api = 'abcd';
//生成签名
$arr = array();
$arr['nonce'] = "nonce=$randomStr";
$arr['api'] = "api=$api";
$signature = $this -> arithmetic($arr);
//url地址
$url = self::URL;
//请求体
$body = [
'api'=>$api,
'nonce'=>$randomStr,
'sign'=>$signature,
];
//post
$result = $this -> httpPost($url,$appid,$body);
return json(['data'=>$result]);
}
//curl模拟get请求。
private function httpGet($url,$appid,$query){
//初始化
$curl = curl_init();
$headers = array();
//微秒时间戳
$time = microtime();
list($msec, $sec) = explode(' ', $time);
//毫秒时间戳
$msectime = (int)sprintf('%.0f', (floatval($msec) + floatval($sec)) * 1000);
//头部字段（自定义）
$headers[] = "app_id:$appid";
$headers[] = "psd_entry:$msectime";
//将数组转化为字符串参数
$query = http_build_query($query);
//将请求的参数拼接在url后面
$url = $url.'?'.$query;
//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($curl,CURLOPT_RETURNTRANSFER,1);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);//绕过ssl验证
//参数为0表示不带头文件，为1表示带头文件
curl_setopt($curl, CURLOPT_HEADER,0);
//头部字段
curl_setopt($curl, CURLOPT_HTTPHEADER,$headers);
$result = curl_exec($curl);
curl_close($curl);
return $result;
}
//curl模拟post请求。
private static function httpPost($url,$appid,$body){
$curl = curl_init();
$headers = array();
$time = microtime();
list($msec, $sec) = explode(' ', $time);
$msectime = (int)sprintf('%.0f', (floatval($msec) + floatval($sec)) * 1000);
//头部字段(自定义)
$headers[] = "app_id:$appid";
$headers[] = "psd_entry:$msectime";
//设置提交的url
curl_setopt($curl, CURLOPT_URL, $url);
//设置头文件的信息作为数据流输出
curl_setopt($curl, CURLOPT_HEADER, 1);
curl_setopt($curl, CURLOPT_HTTPHEADER,$headers);
//设置获取的信息以文件流的形式返回，而不是直接输出。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
//设置post方式提交
curl_setopt($curl, CURLOPT_POST, 1);
//添加post数据
curl_setopt($curl, CURLOPT_POSTFIELDS, $body);
//执行命令
$data = curl_exec($curl);
//关闭URL请求
curl_close($curl);
//获得数据并返回
return $data;
}
//随机生成字符串
private function createNonceStr($length = 16) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
/**
* @param $timeStamp 时间戳
* @param $randomStr ASCII可见字符串
* @return string 返回签名
*/
private function arithmetic($arr){
$key = self::KEY;
//按照首字母大小写顺序排序
sort($arr,SORT_STRING);
//拼接成字符串
$str = implode('&',$arr);
//拼接key
$stringSignTemp = $str.'&key='.$key;
//生成签名
$sign=strtoupper(MD5($stringSignTemp));
return $sign;
}
}
```
