localhost: data not going into database - php

Question

i am trying to make a registration system but when i register the data isn't there.
i tried to search same questions but i couldn't find the issue, and the worst is that the script detect the database but wont get the data in.
The PHP script :
<?php
$bdd = new PDO('mysql:host=127.0.0.1;dbname=fireblock', 'root', '');
if(isset($_POST['submitform'])) {
$username = htmlspecialchars($_POST['username']);
$email = htmlspecialchars($_POST['email']);
$email2 = htmlspecialchars($_POST['email2']);
$pass = sha1($_POST['pass']);
$pass2 = sha1($_POST['pass2']);
if(!empty($_POST['username']) AND !empty($_POST['email']) AND !empty($_POST['email2']) AND !empty($_POST['pass']) AND !empty($_POST['pass2'])) {
$usernamelength = strlen($username);
if($usernamelength <= 255) {
if($email == $email2) {
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
$reqemail = $bdd->prepare("SELECT * FROM members WHERE email = ?");
$reqemail->execute(array($email));
$emailexist = $reqemail->rowCount();
if($emailexist == 0) {
if($pass == $pass) {
$insertmbr = $bdd->prepare("INSERT INTO members(username, email, pass) VALUES(?, ?, ?)");
$insertmbr->execute(array($username, $email, $pass));
$error = "Your account has been created! Connect";
} else {
$error = "Your passs are not the same!";
}
} else {
$error = "Email already used!";
}
} else {
$error = "Your email is invalid!";
}
} else {
$error = "Your emails are not the same!";
}
} else {
$error = "Your username can't get upper than 255 characters!";
}
} else {
$error = "Every fields should be filled!";
}
}
?>