What should I do if php cannot receive parameters?

Solution to the problem that php cannot receive parameters: 1. Modify the sending code to "$data = array ('openid' => "123",'keyword' => "321");$ data = json_encode($data);..."; 2. Modify the receiving end code to "$obj=file_get_contents("php://input");$data=json_decode(...)".

The operating environment of this tutorial: Windows 10 system, PHP version 8.1, DELL G3 computer

What should I do if php cannot receive parameters? ?

• curl submission parameter php cannot receive the problem

Specific problem description:

Write an interface using thinkphp.

Use curl to call the interface on the remote end. Curl is written as follows:

function curl($url,$method,$params,$auth){
    
    
    //初始化CURL句柄
    $curl = curl_init();
    
    curl_setopt($curl, CURLOPT_URL, $url);//设置请求的URL
    #curl_setopt($curl, CURLOPT_HEADER, false);// 不要http header 加快效率
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,1); //设为TRUE把curl_exec()结果转化为字串，而不是直接输出
    
    //SSL验证
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);    // https请求时要设置为false 不验证证书和hosts  FALSE 禁止 cURL 验证对等证书（peer's certificate）, 自cURL 7.10开始默认为 TRUE。从 cURL 7.10开始默认绑定安装。
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);//检查服务器SSL证书中是否存在一个公用名(common name)。
    
    $header[] = "Content-Type:application/json;charset=utf-8";
    if(!empty($header)){
        curl_setopt ( $curl, CURLOPT_HTTPHEADER, $header );//设置 HTTP 头字段的数组。格式： array('Content-type: text/plain', 'Content-length: 100')
    }
    
    //请求时间
    $timeout = 30;
    curl_setopt ($curl, CURLOPT_CONNECTTIMEOUT, $timeout);//设置连接等待时间
    
    //不同请求方法的数据提交
    switch ($method){
        case "GET" :
            curl_setopt($curl, CURLOPT_HTTPGET, true);//TRUE 时会设置 HTTP 的 method 为 GET，由于默认是 GET，所以只有 method 被修改时才需要这个选项。
            break;
        case "POST":
            if(is_array($params)){
                $params = json_encode($params,320);
            }
            #curl_setopt($curl, CURLOPT_POST,true);//TRUE 时会发送 POST 请求，类型为：application/x-www-form-urlencoded，是 HTML 表单提交时最常见的一种。
            #curl_setopt($curl, CURLOPT_NOBODY, true);//TRUE 时将不输出 BODY 部分。同时 Mehtod 变成了 HEAD。修改为 FALSE 时不会变成 GET。
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");//HTTP 请求时，使用自定义的 Method 来代替"GET"或"HEAD"。对 "DELETE" 或者其他更隐蔽的 HTTP 请求有用。 有效值如 "GET"，"POST"，"CONNECT"等等；
            //设置提交的信息
            curl_setopt($curl, CURLOPT_POSTFIELDS,$params);//全部数据使用HTTP协议中的 "POST" 操作来发送。
            break;
        case "PUT" :
            curl_setopt ($curl, CURLOPT_CUSTOMREQUEST, "PUT");
            curl_setopt($curl, CURLOPT_POSTFIELDS,json_encode($params,320));
            break;
        case "DELETE":
            curl_setopt ($curl, CURLOPT_CUSTOMREQUEST, "DELETE");
            curl_setopt($curl, CURLOPT_POSTFIELDS,$params);
            break;
    }
    
    
    
    $data = curl_exec($curl);//执行预定义的CURL
    $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);//获取http返回值,最后一个收到的HTTP代码
    curl_close($curl);//关闭cURL会话
    $res = json_decode($data,true);
    
    return $res;
}

I found a problem, that is, when the post is submitted, the background cannot receive the passed parameters.

Background reception:

  public function getUserById(){
       $custid = I("post.cust_uid");
        $companyId = I("post.company_id");
      
        $model = M('chatuser','snake_',$this->db);
      
        $mine = $model->field('username,avatar,sign,id')->where(['id'=>$custid])->find();
        $company = $model->field('username,avatar,sign,id')->where(['id'=>$companyId])->find();
        
            
        $return['mine'] =$mine;
        $return['company'] =$company;
        $return['status'] = 1;
       
     $this->ajaxReturn($return);
    }

After various debugging, it was found that

$header[] = "Content-Type:application/json;charset=utf-8";

and

 if(is_array($params)){
               $params = json_encode($params,320);
           }

in the header submitted json-type data, and using The postman test interface uses body's form-data

. Urgent, you can only comment out the above two codes first. Submit normally. When you have time, let’s take a look at the json receiving method.

If there are any classmates who know and want to leave a message to clear up any doubts, we will be grateful!

The code for the correct solution is as follows:

//发送端
$data = array (
            'openid'  => "123",
            'keyword' => "321"
        );
        $data = json_encode($data);
        ...
        curl_setopt($curl, CURLOPT_POST, 1);   
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
//接受端
$obj = file_get_contents("php://input");
$data = json_decode($obj, true);

Recommended study: "PHP Video Tutorial"

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