Olá, estou praticando o CRUD com PHP e mysql, criei um form para preencher informações mas quando clico em submit ela nao vai para o banco de dados, alguém podria ajudar?
segue código obrigado!
Formulário
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!--Bootswatch-->
<link rel="stylesheet" href="https://bootswatch.com/4/sandstone/bootstrap.min.css">
<!--Font Awesome-->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<title>Cadastro alunos GBK</title>
</head>
<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarColor02" aria-controls="navbarColor02" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
</nav>
<br>
<body>
<?php require_once 'cadastro.php'; ?>
<div class="container" class="col-md-4" class="col-md-offset-4">
<form action="cadastro.php" method="POST">
<div class="row">
<div class="col-6 col-md-4">
<div class="form-group" class="col-md-4">
<label for="matricula">Matricula</label>
<input type="number" name='matricula' class="form-control" id="matricula" aria-describedby="matricula" placeholder="Número da matrícula">
</div>
</div>
<div class="col-12 col-md-8">
<div class="form-group">
<label for="nome">Nome</label>
<input type="text" class="form-control" name='nome' id="nome" placeholder="Nome Completo">
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-12 col-md-8">
<div class="form-group">
<label for="faixa">Faixa atual</label>
<select class="form-control" aria-label="faixa" name='faixa'>
<option selected>Selecione a faixa</option>
<option value="Branca">Branca</option>
<option value="Amarela">Amarela</option>
<option value="Vermelha">Vermelha</option>
<option value="Laranja">Laranja</option>
<option value="Verde">Verde</option>
<option value="Roxa">Roxa</option>
<option value="Marrom">Marrom</option>
<option value="Preta">Preta</option>
</select>
</div>
</div>
<div class="col-6 col-md-4">
<div class="form-group">
<label for="dataExame">Data do último exame de faixa</label>
<input type="date" class="form-control" id="dataExame" name='dataexame'>
</div>
</div>
</div>
<br>
<div class="row justify-content-center">
<button type="button" class="btn btn-success" name='cadastro'>Cadastrar</button>
</div>
</form>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>
</body>
</html>CREATE
<?php
$mysqli = new mysqli('localhost', 'root', '', 'cadastro') or die(mysqli_error($mysqli));
if (isset($_POST['cadastro'])){
$matricula = $_POST['matricula'];
$nome = $_POST['nome'];
$faixa = $_POST['faixa'];
$exame = $_POST['dataexame'];
$mysqli->query("INSERT INTO cadastro (matricula, nome, faixa, dataexame) VALUES ('$matricula','$nome','$faixa','$exame')") or
die($mysqli->error);
}
?>