在php中未定义的索引

Question

不确定我在这里错过了什么。我在插入workForce数据时发生此错误。当我检查MySQL中，所有的数据得到inseted，只有twf为0

public void addWorkForce(final String subcontractors, final String noPeople, final String noHours, final long id) 
    { 
     class AddWorkForce extends AsyncTask<String, Void, String> { 
      ProgressDialog loading; 

      @Override 
      protected void onPreExecute() { 
       super.onPreExecute(); 
       loading = ProgressDialog.show(WorkDetailsTable.this, "Please Wait",null, true, true); 
      } 

      @Override 
      protected void onPostExecute(String s) { 
       super.onPostExecute(s); 
       loading.dismiss(); 
       Toast.makeText(getApplicationContext(),s,Toast.LENGTH_LONG).show(); 
      } 

      @Override 
      protected String doInBackground(String... params) { 

       HashMap<String, String> data = new HashMap<String,String>(); 
       data.put(Config.KEY_SUBCONTRACTORS,subcontractors); 
       data.put(Config.KEY_NUMBERPERSONS,noPeople); 
       data.put(Config.KEY_NUMBERHOURS,noHours); 
       data.put(Config.KEY_TWF,String.valueOf(id)); 
       RequestHandler rh=new RequestHandler(); 
       String result = rh.sendPostRequest(Config.ADD_WORKFORCE,data); 
       return result; 
      } 
     } 

     AddWorkForce ru = new AddWorkForce(); 
     ru.execute(subcontractors,noPeople,noHours); 
    } 

addWorkForce.php

<?php 
    if($_SERVER['REQUEST_METHOD']=='POST'){ 

     //Getting values 
     $subcontractors = $_POST['subcontractors']; 
     $noPeople = $_POST['noPeople']; 
     $noHours = $_POST['noHours']; 
     $twf = $_POST['id']; 


     //Creating an sql query 
     $sql = "INSERT INTO work_force(subcontractors, number_of_person, number_of_hours, twf) VALUES ('$subcontractors','$noPeople','$noHours','$twf')"; 

     //Importing our db connection script 
     require_once('dbConnect.php'); 

     //Executing query to database 
     if(mysqli_query($con,$sql)){ 
      echo 'Work Force Added Successfully'; 
     }else{ 
      echo 'Could Not Add Work Force'; 
     } 

     //Closing the database 
     mysqli_close($con); 
    } 
?> 

Answer 1

检查这个常量的名称：

Config.KEY_TWF