TRF Certest first commit

public/userarea/load_table_columns.php

@@ -0,0 +1,35 @@
+<?php
+header('Content-Type: application/json');
+require_once 'class/db-functions.php';
+
+$response = ["success" => false, "columns" => []];
+
+try {
+    if (!isset($_GET['table']) || empty($_GET['table'])) {
+        throw new Exception("Invalid table name.");
+    }
+
+    $table = preg_replace('/[^a-zA-Z0-9_]/', '', $_GET['table']); // Sanitize table name
+
+    $db = DBHandlerSelect::getInstance();
+    $pdo = $db->getConnection();
+
+    // Retrieve table columns
+    $stmt = $pdo->query("SHOW COLUMNS FROM `$table`");
+    $columns = $stmt->fetchAll(PDO::FETCH_COLUMN);
+
+    if (!$columns) {
+        throw new Exception("No columns found in table.");
+    }
+
+    $response["success"] = true;
+    $response["columns"] = $columns;
+} catch (Exception $e) {
+    $response["message"] = $e->getMessage();
+}
+
+// Log per debugging
+error_log(json_encode($response));
+
+// Restituisce la risposta JSON
+echo json_encode($response);