<?php
require 'db_config.php';

if(isset($_GET["id"]))
{
    $id  = $_GET["id"];
    $sql = "SELECT professionid, professionname, description, apprenticeship from profession WHERE professionid = " . $id . ";";
}
else
{
    $sql = "SELECT professionid, professionname, description, apprenticeship from profession;";
}

$result = $mysqli->query($sql);
if ($result != null)
{
    while($row = $result->fetch_assoc()){
        $json[] = $row;
    }

    $data = $json;
    $result =  mysqli_query($mysqli,$sql);
    echo json_encode($data);
}
else
    echo json_encode(['success' => 0, 'message' => 'keine Daten empfangen!']);
?>