When you must have confused the connection variable.
You are using this in line 17 and 18 of your header.php:
$conectar=new DB;
$conectar=$conectar->conectar();
And so on the error line:
$validaremail=mysqli_query($conexao, "SELECT * FROM usuarios WHERE email='$email'");
Try changing the $ connection variable to $ connect as you started there.
should look like this:
$validaremail=mysqli_query($conectar, "SELECT * FROM usuarios WHERE email='$email'");
Its function of class DB connect () that returns return $conexao; , but what counts is the variable that calls this function in the code:
$conectar=$conectar->conectar();
If correcting this error, new errors appear, you edit this question by putting the new errors in the end.
EDITED
Error in the Registration class of the Cadastro.class.php file :
Classes and functions can not access external variables. So line 15 ( $insert=mysqli_query($conexao, "INSERT... ) of your class can not access the variable $conexao , and even if you change to $conectar will not work either.
You need to enter the variable into the class, and I suggest the magic method __construct() something like this:
<?php
class Cadastro{
private $conexao;
public function __construct($varconexao) {
$this->conexao = $varconexao;
}
public function cadastrar($nome, $nickt, $nickp, $email, $face, $senha, $tel1, $tel2){
...
$insert=mysqli_query($this->conexao, "INSERT INTO usuario...
...
}
}
?>
That is, you create a $conexao variable for your class, and when you start the class you assign your external variable into your class using: new Cadastro($sua_variavel_de_conexao); .
So now just fix your header.php in the line you call the function:
$cadastro = new Cadastro($conectar);
echo "<div class='flash'>";
$cadastro->cadastrar($nome, $nickt, $nickp, $email, $face, $senha, $tel1, $tel2);
echo "</div>";
You already use the $ connect variable for your connection class, I recommend using another variable for the registration, as I did above with $ registration . If you use the same variable as you are currently doing $conectar=new Cadastro; or $conectar=$conectar->cadastrar , you end up overwriting it, and in the future it may give you more headache, depending on how you create your code.
