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I have a login system, which already works on another site and I’m trying to transfer to another, and it doesn’t work at all. I would like someone to take a look. If I type in a wrong user, it returns an invalid user error, so you are checking the database. When I enter a right user, the following error messages appear:
Warning: session_start(): Cannot send Session cookie - headers already sent by (output Started at /home/netosale/public_html/e-educacao/validacao.php:2) in /home/netosale/public_html/e-educacao/validacao.php on line 28
Warning: session_start(): Cannot send Session cache Limiter - headers already sent (output Started at /home/netosale/public_html/e-educacao/validacao.php:2) in /home/netosale/public_html/e-educacao/validacao.php on line 28
Warning: Cannot Modify header information - headers already sent by (output Started at /home/netosale/public_html/e-educacao/validacao.php:2) in /home/netosale/public_html/e-educacao/validacao.php on line 36
I go there on these two lines, and I can’t locate anything abnormal. That could be happening. I’ve downloaded several other login systems, and they all fail. Is it a good problem bootstrap or something? Follow code so they can take a look:
<?php
// Verifica se houve POST e se o usuсrio ou a senha щ(sуo) vazio(s)
if (!empty($_POST) AND (empty($_POST['usuario']) OR empty($_POST['senha']))) {
header("Location: index.php"); exit;
}
// Tenta se conectar ao servidor MySQL
mysql_connect('localhost', 'xzthyb45', '164544515151561') or trigger_error(mysql_error());
// Tenta se conectar a um banco de dados MySQL
mysql_select_db('ljklfdfjkldj') or trigger_error(mysql_error());
$usuario = mysql_real_escape_string($_POST['usuario']);
$senha = mysql_real_escape_string($_POST['senha']);
// Validaчуo do usuсrio/senha digitados
$sql = "SELECT `id`, `nome`, `nivel` FROM `userPerms` WHERE (`usuario` = '".$usuario ."') AND (`senha` = '". sha1($senha) ."') AND (`ativo` = 1) LIMIT 1";
$query = mysql_query($sql);
if (mysql_num_rows($query) != 1) {
// Mensagem de erro quando os dados sуo invсlidos e/ou o usuсrio nуo foi encontrado
echo "Login invсlido!"; exit;
} else {
// Salva os dados encontados na variсvel $resultado
$resultado = mysql_fetch_assoc($query);
}
// Se a sessуo nуo existir, inicia uma
if (!isset($_SESSION)) session_start();
//Salva os dados encontrados na sessуo
$_SESSION['UsuarioID'] = $resultado['id'];
$_SESSION['UsuarioNome'] = $resultado['nome'];
$_SESSION['UsuarioNivel'] = $resultado['nivel'];
// Redireciona o visitante
**header("Location: novaTela.php");**
exit;
?>
Duplicate of https://answall.com/q/4251/5878
– Woss