Can't insert info in a server, but i can as localhost

Question

Im creating an app, but i can\'t insert in a server using Mysql, php and android studio, i can insert as localhost, but when try to insert in the server it just doesn\'t do it.

Answer 1

EDIT 1:

getMessage();
        }
    } else {
        $response['error'] = true;
        $response['message'] = 'Please choose a file.';
    }

    // Display response.
    echo json_encode($response);
} else {
    $response['error'] = true;
    $response['message'] = 'No post method used!';

    // Display response.
    echo json_encode($response);
}

/**
 * We are generating the file name, so this method will 
 * return a file name for the image to be upload.
 * 
 * @return int
 * @throws Exception
 */
function getFileName() {
    try {
        // Connect to database.
        $con = mysqli_connect(HOST, USER, PASS, DB);
        if (!$con) {
            throw new Exception('Could not connect to database!');
        }

        // Select max id.
        $sql = "SELECT max(id) as id FROM reportes2";
        $mysqliResult = mysqli_query($con, $sql);
        if (!$mysqliResult) {
            throw new Exception('The select statement failed!');
        }

        // Fetch max id.
        $result = mysqli_fetch_array($mysqliResult);

        // Close database connection.
        $closed = mysqli_close($con);
        if (!$closed) {
            throw new Exception('The database connection can not be closed!');
        }

        // Validate results.
        if ($result['id'] == null) {
            return 1;
        } else {
            return ++$result['id'];
        }
    } catch (Exception $e) {
        echo $e->getMessage();
        exit();
    }
}

---

EDIT 2 - How to prepare and run queries using mysqli library:

---

Option 1: Using mysqli_stmt_get_result() + mysqli_fetch_array():

', '', '', '');
    if (!$conn) {
        throw new Exception('Connect error: ' . mysqli_connect_errno() . ' - ' . mysqli_connect_error());
    }

    //---------------------------------------------------------
    // Sql statement.
    //---------------------------------------------------------
    $query = "SELECT * FROM users WHERE username = ? AND password = ?";

    //---------------------------------------------------------
    // Prepare sql statement.
    //---------------------------------------------------------
    $stmt = mysqli_prepare($conn, $query);
    if (!$stmt) {
        throw new Exception('The sql statement can not be prepared!');
    }

    //---------------------------------------------------------
    // Bind variables to the prepared statement as parameters.
    //---------------------------------------------------------
    $bound = mysqli_stmt_bind_param($stmt, 'ss', $username, $password);
    if (!$bound) {
        throw new Exception('The variables could not be bound to the prepared statement!');
    }

    //---------------------------------------------------------
    // Execute the prepared statement.
    //---------------------------------------------------------
    $executed = mysqli_stmt_execute($stmt);
    if (!$executed) {
        throw new Exception('The prepared statement could not be executed!');
    }

    //---------------------------------------------------------
    // Get the result set from the prepared statement.
    //---------------------------------------------------------
    $result = mysqli_stmt_get_result($stmt);
    if (!$result) {
        throw new Exception(mysqli_error($conn));
    }

    //---------------------------------------------------------
    // Get the number of rows in statements result set.
    //---------------------------------------------------------
    $rows = mysqli_num_rows($result);

    if ($rows > 0) {
        //---------------------------------------------------------
        // Read the result set.
        //---------------------------------------------------------
        $row = mysqli_fetch_array($result, MYSQLI_ASSOC);
        if (!isset($row)) {
            echo 'No records returned!';
            exit();
        }

        echo 'Login successful: ' . $row['username'] . '/' . $row['password'];
    } else {
        echo 'Invalid username/password. Please check and retry login.';
    }

    //-----------------------------------------------------------
    // Frees stored result memory for the given statement handle.
    //-----------------------------------------------------------
    mysqli_stmt_free_result($stmt);

    //---------------------------------------------------------
    // Close db connection.
    //---------------------------------------------------------
    $closed = mysqli_close($conn);
    if (!$closed) {
        throw new Exception('The database connection can not be closed!');
    }
} catch (Exception $exception) {
    echo '
' . print_r($exception, true) . '
';
    exit();
}

Option 2: Using mysqli_stmt_store_result() + mysqli_stmt_bind_result() + mysqli_stmt_fetch():

', '', '', '');
    if (!$conn) {
        throw new Exception('Connect error: ' . mysqli_connect_errno() . ' - ' . mysqli_connect_error());
    }

    //---------------------------------------------------------
    // Sql statement.
    //---------------------------------------------------------
    $query = "SELECT * FROM users WHERE username = ? AND password = ?";

    //---------------------------------------------------------
    // Prepare sql statement.
    //---------------------------------------------------------
    $stmt = mysqli_prepare($conn, $query);
    if (!$stmt) {
        throw new Exception('The sql statement can not be prepared!');
    }

    //---------------------------------------------------------
    // Bind variables to the prepared statement as parameters.
    //---------------------------------------------------------
    $bound = mysqli_stmt_bind_param($stmt, 'ss', $username, $password);
    if (!$bound) {
        throw new Exception('The variables could not be bound to the prepared statement!');
    }

    //---------------------------------------------------------
    // Execute the prepared statement.
    //---------------------------------------------------------
    $executed = mysqli_stmt_execute($stmt);
    if (!$executed) {
        throw new Exception('The prepared statement could not be executed!');
    }

    //---------------------------------------------------------
    // Transfer the result set from the prepared statement.
    //---------------------------------------------------------
    $stored = mysqli_stmt_store_result($stmt);
    if (!$stored) {
        throw new Exception('The result set from the prepared statement could not be transfered!');
    }

    //---------------------------------------------------------
    // Get the number of rows in statements' result set.
    //---------------------------------------------------------
    $rows = mysqli_stmt_num_rows($stmt);

    if ($rows > 0) {
        //---------------------------------------------------------
        // Bind result set columns to corresponding variables.
        //---------------------------------------------------------
        $bound = mysqli_stmt_bind_result($stmt, $resId, $resUsername, $resPassword);
        if (!$bound) {
            throw new Exception('The result set columns could not be bound to the variables');
        }

        //--------------------------------------------------------------------
        // Fetch results from the prepared statement into the bound variables.
        //--------------------------------------------------------------------
        while (mysqli_stmt_fetch($stmt)) {
            echo 'Successfully returned data:

';
            echo 'ID: ' . $resId . '
';
            echo 'Username: ' . $resUsername . '
';
            echo 'Password: ' . $resPassword . '
';
        }
    } else {
        echo 'Invalid username/password. Please check and retry login!';
    }

    //-----------------------------------------------------------
    // Free stored result memory for the given statement handle.
    //-----------------------------------------------------------
    mysqli_stmt_free_result($stmt);

    //---------------------------------------------------------
    // Close db connection.
    //---------------------------------------------------------
    $closed = mysqli_close($conn);
    if (!$closed) {
        throw new Exception('The database connection can not be closed!');
    }
} catch (Exception $exception) {
    echo '
' . print_r($exception, true) . '
';
    exit();
}

---

Nota bene: Trying to use mysqli_stmt_store_result() together with mysqli_stmt_get_result() will lead to errors.