error when close connection using mysqli on PHP - php

Question

I am new in PHP development, I get a warning like this when making email confirmation registration:
Registration success, please login using your data
Warning: mysqli::close(): Couldn't fetch
mysqli in
/Applications/XAMPP/xamppfiles/htdocs/Twitter/security/access.php on
line 42
here is the simplified code of access.php
class access {
public $host = null;
public $username = null;
public $password = null;
public $dbname = null;
public $conn = null;
public $result = null;
function __construct($xhost,$xusername,$xpassword,$xdbname) {
$this->host = $xhost;
$this->username = $xusername;
$this->password = $xpassword;
$this->dbname = $xdbname;
}
// connection to database
function connect() {
$this->conn = new mysqli($this->host,$this->username,$this->password,$this->dbname);
if (mysqli_connect_errno()) {
echo "Connection to database failed: ".mysqli_connect_error();
}
// support all languages
$this->conn->set_charset("utf8");
}
public function disconnect() {
if ($this->conn != null) {
$this->conn->close();
}
}
//saving token to the database
function saveTokens ($table, $id, $token) {
$query = "INSERT INTO $table SET id=?, token=?";
$statement = $this->conn->prepare($query);
if (!$statement) {
throw new Exception($statement->error);
}
$statement-> bind_param('is',$id,$token);
$returnValue = $statement ->execute();
return $returnValue;
}
// get userID from given Token
function getIDFromToken($table,$token) {
$returnValue = [];
$query = "SELECT id FROM $table WHERE token='$token'";
$result = $this->conn->query($query);
if ($result != null && (mysqli_num_rows($result)>0)) {
$row = $result->fetch_array(MYSQLI_ASSOC);
if (!empty($row)) {
$returnValue = $row;
}
}
return $returnValue;
}
function updateEmailConfirmationStatus($status,$id) {
$query = "UPDATE users SET emailConfirmed =? WHERE id=?";
$statement = $this->conn->prepare($query);
if (!$statement) {
throw new Exception($statement->error);
}
$statement-> bind_param('ii',$status,$id);
$returnValue = $statement ->execute();
return $returnValue;
}
// delete token when ID is available
function deleteToken($table,$token) {
$query = "DELETE FROM $table WHERE token =?";
$statement = $this->conn->prepare($query);
if (!$statement) {
throw new Exception($statement->error);
}
$statement-> bind_param('s',$token);
$returnValue = $statement ->execute();
return $returnValue;
}
}
and I use access.php in confirmationlink.php
here is the code on confirmationlink.php
<?php
require_once("../security/access.php");
if (empty($_GET["token"])) {
echo "Please follow as per the procedure";
return;
}
$token = htmlentities($_GET["token"]);
// making connection to the database
$file = parse_ini_file("../../../../twitter.ini");
$dbhost = trim($file["host"]);
$dbusername = trim($file["username"]);
$dbpassword = trim($file["password"]);
$dbname = trim($file["dbname"]);
$access = new access($dbhost,$dbusername,$dbpassword,$dbname);
$access->connect();
// get ID from database as per the Token created
$info = $access->GetIDFromToken("emailTokens",$token);
$id = $info["id"];
// change emailConfirmed status to 1 if user has pressed confirmation link
$result = $access -> updateEmailConfirmationStatus(1,$id);
// menghapus token apabila ID sudah terkonfirmasi ada di database
if ($result) {
$access ->deleteToken("emailTokens",$token);
echo "Registration success, please login using your data";
}
// close the connection
$access -> disconnect();
I get the error only on the last line of confirmationlink.php file. the database has been changed successfully on MySQL as I want. I also use disconnect method on other PHP file but i have no issue. but somehow I got the issue now
what went wrong in here ? Thanks in advance :)

Answer 1

You need to close your statements before you return the result in each of the functions:
$statement->close();