le btn creer un ordre fctionne

php/api_rechercher_action.php

@@ -0,0 +1,9 @@
+<?php
+require_once __DIR__ . '/db.php';
+$isin = $_GET['isin'] ?? '';
+$db = (new App\Database\Database())->getConnection();
+$stmt = $db->prepare("SELECT * FROM actions WHERE isin = ?");
+$stmt->execute([$isin]);
+$action = $stmt->fetch(PDO::FETCH_ASSOC);
+
+echo json_encode($action ? ['success' => true, ...$action] : ['success' => false]);