使用php和android更新记录

Question

如何使用android和php更新记录。当我在android中更新记录时，没有更新特定电子邮件上的任何记录，我猜测我的php上的代码有问题。

这是我在android上的代码

 public void changeprofile(){


    HashMap postData = new HashMap();

    String emailch = emailchange.getText().toString();

    String password = passch.getText().toString();
    String firstname = fnamech.getText().toString();
    String lastname = lnamech.getText().toString();
    String contact = contactch.getText().toString();
    String confirm = conpassch.getText().toString();

   postData.put("emailc", emailch);
    postData.put("fname", firstname);
    postData.put("lname", lastname);
    postData.put("Password", password);
    postData.put("Confirm", confirm);
    postData.put("contact", contact);


    PostResponseAsyncTask task79 = new PostResponseAsyncTask(ChangeProfile.this, postData, new AsyncResponse() {
        @Override
        public void processFinish(String s) {
            Log.d(LOG, s);
            if (s.contains("change")) {
                Toast.makeText(ChangeProfile.this, "Successfully Change Profile", Toast.LENGTH_LONG).show();
                Intent in = new Intent(ChangeProfile.this, ProfileActivity.class);
                startActivity(in);
            }  else if (s.contains("match"))    {
                Toast.makeText(ChangeProfile.this, "The password didnt match", Toast.LENGTH_LONG).show();


            } else if (s.contains("Fillup"))    {
                Toast.makeText(ChangeProfile.this, "Fill up the form", Toast.LENGTH_LONG).show();


            } else {
                Toast.makeText(ChangeProfile.this, "Invalid Credentials", Toast.LENGTH_LONG).show();
            }

        }
    });
    task79.execute("http://10.0.2.2/wawi/change.php");


}

这是php（change.php）上的代码

require_once('connection.php');


    if(isset($_POST['fname'])){


    $email = $_POST['emailc'];
    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
    $password = $_POST['Password'];
    $confirm = $_POST['Confirm'];
    $contact = $_POST['contact'];

 if( $password == '' || $confirm == '' || $fname == '' || $lname == '' || $contact== ''){
 echo 'Fillup';
 }else{


if($confirm == $password)
{
    mysql_query("UPDATE users SET password='$password', fname='$fname', lname='$lname', contact='$contact' WHERE email='$email'");

    echo "change";
}else
{
    echo "match";

}