ionic $ http.post请求返回空数据

Question

The status is fine 200 but then the data is null here is my codes: in my controller

        var link = 'http://127.0.0.1/mobile/subject.php';
        var userid = localStorage.getItem('loginDetails');
        console.log(userid);

        $http.post(link, {userid}).then(function(res){
        console.log(res);
        })

in my php code. require_once('connection.php');

        $post_data = file_get_contents('php://input');
        $request = json_decode($post_data);

        $userid = $request->userid;

        $subject_sql ="SELECT SubjectName FROM subjects WHERE userid = '"  

        .$userid. "' ";

        $result = $con->query($subject_sql);
        $re=$result->fetch_assoc();
        echo json_encode($re);

        ?>

Here guys i put my localstorage value in a variable "userid" because i want to use my localstorage value in my php code. Is their something wrong with my codes specially in my controller?

Answer 1

if your localstorage already contains the JSON object then you just need to change the {userid} to userid.

    var link = 'http://127.0.0.1/mobile/subject.php';
    var userid = localStorage.getItem('loginDetails');
    console.log(userid);

    $http.post(link, userid, {}).success(function(res){
      console.log(res);
    })
    .error(function(err) {
      console.log(err)
    });

Answer 2

You can't access $request->userid because you sent { userid } as data in $http.post(). Try $http.post(link, {userid : userid}).

Server side, you should :

• Check if $post_data actually contains anything ( var_dump() ),
• Check if localStorage.getItem('loginDetails') is defined.

Advice : Do not forget to escape your sql query. ( How can I prevent SQL injection in PHP? )

Answer 3

Using JSON.parse to convert it to json object it solve my problem. var userid = JSON.parse(localStorage.getItem('loginDetails'));