conexionPOO.php
<?php
class BaseDeDatos {

    //Conexión con la base de datos

    private $dbhost = 'localhost';
    private $dbuser = 'root';
    private $dbpass = '';
    private $dbname = 'asovifacampe';


    public function conexion () {

        $conexion = new mysqli($this->dbhost,$this->dbuser,$this->dbpass,$this->dbname);

        if ($conexion ->connect_error) {

            echo "Error de Connexion ($conexion->connect_errno): $conexion->connect_error\n";

            exit;

        } else {
            return $conexion;
        }

    }

    public function registrar($sql){

        return $this->$conexion->query($sql);

    }

}
?>


verifylogin.php
<?php

$email = $_GET['email'];
$passwordLogin = $_GET['passwordLogin'];

if($email && $passwordLogin){
    LoginAdmin();

}else{
    echo"<script type='text/javascript'>var status = 1; </script>";
}

function LoginAdmin(){
    require_once 'conexionPOO.php';
    $conexion = new BaseDeDatos;
    $conexion->conexion();

    $sql= "SELECT * FROM admin";
    $result=$conexion->query($sql);
    if($result->num_rows>0){

        while($data=$result->fetch_array(MYSQLI_ASSOC)){

            $id=$data['idAdmin'];
            $email=$data['email'];
            $password=$data['password'];

            if(password_verify($passwordLogin,$password)){
                echo"<script type='text/javascript'>

                         window.location='http://localhost/martin/copiasegura/admin/';

                         </script>";
            }else{
                echo"<script type='text/javascript'>var status = 2; </script>";
            }

        }
    }else{
        LoginUsers();
    }
}
?>