Prepared Statements in MariDB - php

Question

I'm fiddling around on my test database, learning how to set it all up.
I'm using PHP and PDO objects to access my database and get Data from it.
I'm also using prepared statements against MySQL Injections.
This is the code I'm using:
mainframe();
function mainframe(){
$connection = establishConnectionToDatabase();
$result = getData($connection);
//var_dump($result);
//echo json_encode($result);
echo $result;
}
function getData($connection){
$fetch = $connection->prepare("SELECT * FROM users_tbl");
$fetch->execute();
$result = $fetch->fetchAll(PDO::FETCH_ASSOC);
return $result;
}
function establishConnectionToDatabase(){
try
{
$connection = new PDO('mysql:host=localhost;dbname=foundationtests',
'verwalter','test');
}
catch(PDOException $e)
{
echo $e->getMessage();
}
return $connection;
}
The table Im Accessing looks like this (see screenshot):
https://imgur.com/I06RF9e
When executing the above code, I'm only getting back
Notice: Array to string conversion in D:\foundationtests\src\assets\php\test.php on line 12
Array
I already tried out without prepared statements and it worked. I don't know what I'm missing.

Answer 1

You query is fine, you can't echo an array.
As you're returning an array, try this
function getData($connection){
$fetch = $connection->prepare("SELECT * FROM users_tbl");
$fetch->execute();
$result = $fetch->fetchAll(PDO::FETCH_ASSOC);
return (object)$result;
}
This will return your value as an object. Then you can echo whatever value using $result->user_id for example.
You can learn more about objects here
UPDATE
As has been pointed out, you can also just make it return as an object by change the 4th line from $result = $fetch->fetchAll(PDO::FETCH_ASSOC); to $result = $fetch->fetchAll(PDO::FETCH_OBJ);, and then changing the last line back to return $result;