PHP to JSON - Why this code doesn't work? - php

Question

I'm not a very expert programmer but for an exam text I have to do an android app that interact with a php server. I read lots of tutorial and examples, but the code I write doesn't work. Could you tell me why?
PHP code
<?php
$conn = mysqli_connect("localhost","root","","my_onceuponatimestories");
if (mysqli_connect_error()) {
echo("connessione fallita!!".mysqli_connect_error());
exit;
} else {
$sql= "SELECT * ";
$sql.="FROM stories";
//$sql.="WHERE ";
// echo $sql;
//echo "<br>";
$result=mysqli_query($conn,$sql);
if ($result){
if (mysqli_num_rows($result)>0){
//echo mysqli_num_rows($result);
//echo "<br>";
while($e=mysqli_fetch_assoc($result)){
$output = array(htmlspecialchars($e['title']), htmlspecialchars($e['author']));
//$output = array(htmlspecialchars($e['title']), htmlspecialchars($e['author']));
//echo json_encode($output);
}
//echo(json_encode($ris));
}
}
mysqli_close($conn);
}
?
And my java code:
public void getData (View v){
HttpGet httpGet = new HttpGet("http://www.onceuponatimestories.altervista.org/viewAnd.php");
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity= null;
String response = "NADA";
try {
HttpResponse httpReponse =httpClient.execute(httpGet);
httpEntity = httpReponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
//} catch (UnsupportedEncodingException e) {
//e.printStackTrace();
}
TextView result = (TextView) findViewById(R.id.textView1);
result.setText(response);;
}

Answer 1

You commented out your echo statement so PHP isn't going to give you any text back. Also, you don't assign a value to the $ris variable in your PHP. What do you see when you just navigate to the PHP file in a browser?