communicate with web database with android - php

Question

I have a signup form in a android app which consist of a username and a password. I want that when a user click the submit button of the signup form then the username and password will be saved into a web-database(mySql database).
When a user press submit button then sendPostRequest(givenUsername, givenPassword); is executed.
and sendPostRequest() function is like that
private void sendPostRequest(String givenUsername, String givenPassword) {
class SendPostReqAsyncTask extends AsyncTask<String, Void, String>{
#Override
protected String doInBackground(String... params) {
String paramUsername = params[0];
String paramPassword = params[1];
System.out.println("*** doInBackground ** paramUsername " + paramUsername + " paramPassword :" + paramPassword);
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://10.0.2.2/imon.php");
BasicNameValuePair usernameBasicNameValuePair = new BasicNameValuePair("paramUsername", paramUsername);
BasicNameValuePair passwordBasicNameValuePAir = new BasicNameValuePair("paramPassword", paramPassword);
List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
nameValuePairList.add(usernameBasicNameValuePair);
nameValuePairList.add(passwordBasicNameValuePAir);
try {
UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nameValuePairList);
httpPost.setEntity(urlEncodedFormEntity);
try {
HttpResponse httpResponse = httpClient.execute(httpPost);
InputStream inputStream = httpResponse.getEntity().getContent();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
StringBuilder stringBuilder = new StringBuilder();
String bufferedStrChunk = null;
while((bufferedStrChunk = bufferedReader.readLine()) != null){
stringBuilder.append(bufferedStrChunk);
}
return stringBuilder.toString();
} catch (ClientProtocolException cpe) {
System.out.println("First Exception caz of HttpResponese :" + cpe);
cpe.printStackTrace();
} catch (IOException ioe) {
System.out.println("Second Exception caz of HttpResponse :" + ioe);
ioe.printStackTrace();
}
} catch (UnsupportedEncodingException uee) {
System.out.println("An Exception given because of UrlEncodedFormEntity argument :" + uee);
uee.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if(result.equals("working")){
Toast.makeText(getApplicationContext(), "HTTP POST is working...", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(), "Invalid POST req...", Toast.LENGTH_LONG).show();
}
}
}
SendPostReqAsyncTask sendPostReqAsyncTask = new SendPostReqAsyncTask();
sendPostReqAsyncTask.execute(givenUsername, givenPassword);
}
And my imon.php is like that:
<?php
$varUsername = $_POST['paramUsername'];
$varPassword = $_POST['paramPassword'];
if($varUsername != "" && $varPassword != ""){
$con = mysql_connect('localhost', 'root', '');
if (!$con) {
die('Not connected : ' . mysql_error());
}
// make foo the current db
$db_selected = mysql_select_db('post_db', $con);
if (!$db_selected) {
die ('Can\'t use foo : ' . mysql_error());
}
$sql="INSERT INTO post_table (username,password)
VALUES
('$varUsername ','$varPassword')";
if (!mysql_query($con,$sql))
{
die('Error: ' . mysql_error($con));
}
echo 'working';
}else
{
echo 'invalid';
}
?>
But data is not inserted into my-sql database.
What am i wrong here??
What should i do to insert the data of signup form into web database??

Answer 1

You can't do this
mysql_connect('localhost', 'root', '');
and then do this
if (!mysqli_query($con,$sql))
mysql and mysqli are separate extensions. you can't share resources from one with another.
mysqli_query() and mysql_query() doesn't take the same param order. the first param of mysql_query() is the query. where in mysqli_query first parameter is the connection resource. You were also intermixing the connections earlier as well.