title: php java android POST method issue
body: <p>I have android application that check if in DB exists already the phone number. but always it return "+" even there doesn't exists the phone number, this is my code:</p>
  
  <pre><code>  URL url = new URL(URL_CHECK);
                  HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                  httpURLConnection.setRequestMethod("POST");
                  httpURLConnection.setDoInput(true);
                  httpURLConnection.setDoOutput(true);
                  OutputStream OS = httpURLConnection.getOutputStream();
                  BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8"));
                  String data = URLEncoder.encode("cphone", "UTF-8") + "=" + URLEncoder.encode(params[0], "UTF-8");
                  bufferedWriter.write(data);
                  bufferedWriter.flush();
                  bufferedWriter.close();
                  OS.close();
                  InputStream IS = httpURLConnection.getInputStream();
                  BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(IS, "UTF-8"));
                  String response = "";
                  String line ="";
                  while ((line = bufferedReader.readLine()) != null) {
                      response += line;
  
                  }
                  bufferedReader.close();
                  IS.close();
                  info = response;
                  return info; 
  </code></pre>
  
  <p>The variable "info" always equals "+". This is my PHP Script:</p>
  
  <pre><code>    &lt;?php
  $servername = "xxx";
  $username = "xxx";
  $password = "xxx";
  $dbname = "registers";
  $con = new mysqli($servername, $username, $password, $dbname);
   $user_name = $_POST["cphone"];  
   $sql_query = "select id from users where phone like '$user_name';";  
   $result = mysqli_query($con,$sql_query);  
   if(mysqli_num_rows($result) &gt;0 )  
   {  
   $row = mysqli_fetch_assoc($result);  
   $name =$row["id"];   
   echo "$name";
   }  
   else  
   {   
   echo "+";  
   }  
   ?&gt;  
  </code></pre>
  
  <p>The php script work when instead of $_POST["cphone"] I write example "+37455001100".</p>