added statistic and remove froms school

public/userarea/remove_school.php

@@ -0,0 +1,59 @@
+<?php
+session_start();
+include('include/headscript.php');  // ← adatta il path se necessario (da userarea/ sale di due livelli)
+
+header('Content-Type: application/json');
+
+if (!isset($_SESSION['iduserlogin'])) {
+    echo json_encode(['success' => false, 'message' => 'Non autorizzato']);
+    exit;
+}
+
+$dbHandler = DBHandlerSelect::getInstance();
+$pdo = $dbHandler->getConnection();
+
+$school_id = (int)($_POST['school_id'] ?? 0);
+$user_id   = (int)$_SESSION['iduserlogin'];
+
+if ($school_id <= 0) {
+    echo json_encode(['success' => false, 'message' => 'Scuola non valida']);
+    exit;
+}
+
+// Verifica iscrizione attiva
+$stmt = $pdo->prepare("
+    SELECT id FROM user_schools 
+    WHERE user_id = ? AND school_id = ? AND status = 'active'
+");
+$stmt->execute([$user_id, $school_id]);
+if (!$stmt->fetch()) {
+    echo json_encode(['success' => false, 'message' => 'Non sei iscritto a questa scuola']);
+    exit;
+}
+
+// Soft-delete: imposta status = 'inactive'
+$stmt = $pdo->prepare("
+    UPDATE user_schools 
+    SET status = 'inactive', updated_at = CURRENT_TIMESTAMP 
+    WHERE user_id = ? AND school_id = ?
+");
+$stmt->execute([$user_id, $school_id]);
+
+// Opzionale: resetta scuola corrente in sessione
+if (isset($_SESSION['school_id']) && $_SESSION['school_id'] == $school_id) {
+    unset($_SESSION['school_id'], $_SESSION['school_name'], $_SESSION['school_selected']);
+}
+
+// (Opzionale) cancella dati associati - commenta se NON vuoi eliminare
+// Esempio cancellazione prenotazioni:
+$pdo->prepare("
+    DELETE sb FROM session_bookings sb
+    JOIN class_sessions cs ON sb.session_id = cs.id
+    WHERE sb.user_id = ? AND cs.school_id = ?
+")->execute([$user_id, $school_id]);
+
+// Esempio cancellazione ordini:
+$pdo->prepare("DELETE FROM orders WHERE user_id = ? AND school_id = ?")
+    ->execute([$user_id, $school_id]);
+
+echo json_encode(['success' => true]);