A Notice appeared stating that the variable was not defined, but everything is fine in my view.
add_category.php page
<!DOCTYPE html> <?php session_start(); ?> <html>
<head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" type="text/css"> <link rel="stylesheet" href="css/style.css" type="text/css"> <title>Área Administrativa</title> </head>
<body> <?php include_once("includes/menu.php");?> <div class="py-5">
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="card">
<div class="card-header">Adicionar Categoria
<br> </div>
<div class="card-body">
<form method="POST" action="includes/adcCategoria.php">
<input type="text" name="categoria" class="form-control" placeholder="Categoria" required="required">
<br>
<p class="text-center bg-danger text-white">
<?php
if(isset($_SESSION['categoriaErro'])){
echo $_SESSION['categoriaErro'];
unset($_SESSION['categoriaErro']);
}
?>
</p>
<p class="text-center bg-success text-white">
<?php
if(isset($_SESSION['categoriaSucesso'])){
echo $_SESSION['categoriaSucesso'];
unset($_SESSION['categoriaSucesso']);
}
?>
</p>
<a href="includes/adcCategoria.php" class="btn btn-light btn-lg btn-block">Cadastrar</a>
</form>
</div>
</div>
</div>
</div>
</div> </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/1.11.0/umd/popper.min.js"integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js"integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script> </body>
</html>
adcCategoria.php
<?php
session_start();
$adicionar_categoria = $_POST['categoria'];
include_once("../../config/conexao.php");
$resultCategoria = mysql_query("INSERT INTO categorias(nomeCategoria) VALUES ('$adicionar_categoria')");
//echo "Categoria: ".$resultCategoria['nomeCategoria'];
if(empty($resultCategoria)){
$_SESSION['categoriaErro'] = "Por favor, adicione uma categoria válida.";
header("Location: ../adicionar_categoria.php");
}else{
$_SESSION['categoriaSucesso'] = "Categoria adicionada com sucesso.";
header("Location: ../adicionar_categoria.php");
}
?>
When I try to create a new category, it actually works and creates in the database, but does not insert the text, in this case, the data written in the input.