I can't understand why var_dump doesn't work?

Question

PHP

<?php
include 'includes/header.php';
include '../library/Services.php';
$services = new Services();

$getServiceByServiceId = $services->getServiceById($_GET['service_id']);

if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['edit'])) {
    $editServiceById = $services->editServiceById($_GET['service_id'], $_POST);
}
?>

<nav class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-0">
    <a class="navbar-brand col-sm-3 col-md-2 mr-0" href="#">BosCourier</a>
    <ul class="navbar-nav px-3">
        <li class="nav-item text-nowrap">
            <a class="nav-link" href="#">Sign out</a>
        </li>
    </ul>
</nav>

<div class="container-fluid" style="">
    <div class="row">
        <nav class="col-md-2 d-none d-md-block bg-light sidebar">
            <div class="sidebar-sticky">
                <ul class="nav flex-column">
                    <li class="nav-item">
                        <a class="nav-link active" href="#">
                            <span data-feather="home"></span>
                            Dashboard
                            <span class="sr-only">(current)</span>
                        </a>
                    </li>
                </ul>
            </div>
        </nav>
        <main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
            <h2>Edit <?= $getServiceByServiceId->name  ?> </h2>
            <form method="post">
                <div class="form-group">
                    <label for="text"></label>
                    <textarea name="text" class="form-control" id="text" rows="3"><?= $getServiceByServiceId->text ?></textarea>
                </div>
                <input type="submit" name="edit" class="btn btn-secondary btn-lg mt-2" value="Edit" />
            </form>
        </main>
    </div>
</div>
<?php include 'includes/footer.php'; ?>

Services.php

<?php
include_once 'Session.php';
include 'Database.php';

class Services
{
    private $db;

    public function __construct()
    {
        $this->db = new Database();
    }

      /**
     * @param $serviceId
     * @param $data
     * @return string
     */
    public function editServiceById($serviceId, $data)
    {
        var_dump($serviceId);
        die;
        $sql = "UPDATE services set text = :text WHERE id = :id";
        $query = $this->db->pdo->prepare($sql);
        $query->bindValue(':text', $text);
        $query->bindValue(':id', $serviceId);
        $result = $query->execute();
        if ($result) {
            $message = "<div class='alert alert-success'>True</div>";
            return $message;
        } else {
            $message = "<div class='alert alert-danger'><strong>False</strong></div>";
            return $message;
        }
    }

    /**
     * @param $serviceId
     * @return mixed
     */
    public function getServiceById($serviceId){
        $sql = "SELECT * FROM services WHERE id = :id LIMIT 1";
        $query = $this->db->pdo->prepare($sql);
        $query->bindValue(':id', $serviceId);
        $query->execute();
        $result = $query->fetch(PDO::FETCH_OBJ);
        return $result;
    }
}

Answer 1

$_GET['service_id']what?

Answer 2

We change:

if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['edit'])) {
    $editServiceById = $services->editServiceById($_GET['service_id'], $_POST);
}

On the:

// Display errors 
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
// Log values
echo "<pre>";
var_dump($_SERVER['REQUEST_METHOD'], $_POST['edit'], isset($_POST['edit']));
echo "</pre>";

if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['edit'])) {
    $editServiceById = $services->editServiceById($_GET['service_id'], $_POST);
}

We repeat sending the form and look at what and where did not go. And then we learn to debug banal things.
PS leni_m - spolerite :P