diff --git a/sign_in.html b/sign_in.html
index 14dc6ea..89126bf 100644
--- a/sign_in.html
+++ b/sign_in.html
@@ -1,7 +1,30 @@
 <!-- Traitement PHP -->
 <?php 
+/*
+Faire de la sécurité et de l'optimisation
+Ce code est pourri mais VRAIMENT
+*/
+$servername = 'mysql-serny-nsi.alwaysdata.net';
+$username = 'serny-nsi';
+$mdp = 'ecole9090*';
 
+$bdd = new PDO('mysql:host=mysql-serny-nsi.alwaysdata.net;dbname=serny-nsi_main', $username, $mdp);
 
+if (isset($_POST['submit'])) {
+	if (isset($_POST["f_email"]) AND !empty($_POST["f_email"]) AND isset($_POST["f_password"]) AND !empty($_POST["f_password"])) {
+		$password = htmlspecialchars($_POST['password']);
+		$mail = htmlspecialchars($_POST['f_email']);
+		
+		$look = $bdd->("SELECT * FROM membres WHERE email = ?");
+		$look->execite(array($mail));
+		$userexist = -1;
+		$userexist = $look->rowCount();
+		if ($userexist == 0) {
+
+		} else {
+			$erreur = "Le mail utilisé est inconnu."
+		}
+}
 
 ?>
 <!DOCTYPE html>
@@ -36,6 +59,9 @@
 					<input type="submit" name="" value="Se connecter" id="submit">
 				</div>
 			</div>
+			<div>
+				<?= $erreur ?>
+			</div>
 		</form>
 	</div>
 </body>
