Convert MysqlData to JSON - php

Question

Hi I am creating an android app and made a fetch API that can get the converted json data
Here's my code
lib.php
public function fetchUserData($username)
{
try
{
$stmt = $this->db->prepare("SELECT * FROM user_profile WHERE username=:username");
$stmt->execute(array(':username' => $username));
$userRows = $stmt->fetch(PDO::FETCH_ASSOC);
if($stmt->rowCount() > 0)
{
return true;
}
else
{
return false;
}
}
catch(PDOException $ex)
{
echo $ex->getMessage();
}
}
and on my fetch_api.php
<?php
require_once '../database/database.php';
if($_SERVER['REQUEST_METHOD'] == 'POST')
{
// edittext from android
$username = $_POST['username'];
$arr = array();
if($user->fetchUserData($username))
{
$arr['success'] = 1;
$arr['message'] = "Success fetching data";
echo json_encode($arr);
}
else
{
$arr['success'] = 0;
$arr['message'] = "Failed fetching data";
echo json_encode($arr);
}
}
?>
Right now I can successfully get the
{
"success": 1,
"message": "Success fetching data"
}
Now I want to display all of my data like fullname, address, phonenumber etc to be displayed .
When I am trying to do it like this
lib.php
public function fetchUserData($username)
{
try
{
$stmt = $this->db->prepare("SELECT * FROM user_profile WHERE username=:username");
$stmt->execute(array(':username' => $username));
$userRows = $stmt->fetch(PDO::FETCH_ASSOC);
if($userRows)
{
$response["success"] = 1;
$response["message"] = "User Profile";
$response["user"] = array();
foreach($userRows as $rows)
{
$user = array();
$user["username"] = $rows['username'];
$user["fullname"] = $rows['fullname'];
array_push($response["user"], $user);
}
echo json_encode($response);
}
else
{
$response["success"] = 0;
$response["message"] = "Failed Fetching";
die(json_encode($response));
}
}
catch(PDOException $ex)
{
echo $ex->getMessage();
}
}
It's giving me the error saying
illegal string offset warning on username and fullname
I hope I am clear on my problem . Please ask me if my question is not clear so I can edit my question . Thank you.
ADDED
when I directly use json_encode like this
public function fetchUserData($username)
{
try
{
$stmt = $this->db->prepare("SELECT * FROM user_profile WHERE username=:username");
$stmt->execute(array(':username' => $username));
$userRows = $stmt->fetch(PDO::FETCH_ASSOC);
json_encode($userRows);
}
catch(PDOException $ex)
{
echo $ex->getMessage();
}
}
it gives me this result
{"success":0,"message":"Failed fetching data"}

Answer 1

As I understand the problem that you are facing is how to return rows from the class methods, when it should only return true on success and false on fail.
You got something like that:
<?php
class user{
...
public function fetchUserData($username)
{
try
{
$stmt = $this->db->prepare("SELECT * FROM user_profile WHERE username=:username");
$stmt->execute(array(':username' => $username));
$userRows = $stmt->fetch(PDO::FETCH_ASSOC);
if($stmt->rowCount() > 0)
{
return true;
}
else
{
return false;
}
}
catch(PDOException $ex)
{
echo $ex->getMessage();
}
}
...
}
?>
You need to add a public property like $userRows to it and assign that property with your method:
class user{
public $userRows; // added here
...
public function fetchUserData($username)
{
try
{
$stmt = $this->db->prepare("SELECT * FROM user_profile WHERE username=:username");
$stmt->execute(array(':username' => $username));
$this->userRows = $stmt->fetch(PDO::FETCH_ASSOC); // changed here
And after that you can:
<?php
...
if($user->fetchUserData($username)){
echo json_encode($user->userRows);
}else{
echo "error occured";
}
Hopefully it helped.